I got this off the Henkin website maintained by Hillary Henkin.
My grandfather was Morris, and my father is Herbert. It's a little hard to read in this form, so you may want to print it out on full size paper:

Here are the descendants of the first Genkin we know about, long ago (for us) in the 1840's, in Russia.

If you are familar with these people, please write the webmaster. We encourage additions and corrections!
(Remember the names were spelled many different ways in translation and assimilation, so a different spelling is not necesarily a mistake.) Their surname, when translated directly from the original Russian, would've been spelled "Genkin", with a gutteral "G". However, as the new immigrants settled in North America, they discovered that it was being mis-pronounced, similar to "Jenkin". They discovered that by spelling it "Henkin", it was pronounced correctly.



Descendants of Patriarch Genkin

1 Patriarch Genkin ? - 1904
.. +Basa
........ 2 Shia Genkin 1855 - 1943
............ +Hannah Sarah Wolf 1861 - ?
.................. 3 Josef Genkin Born: in Russia
............................. 4 Ben Genkin ? - 1941-45
............................. 4 (Josef Son #2) Genkin
.................. 3 Rose Genkin 1889 - 1964
...................... +Joseph Pollock
.................. 3 Edith (Eda) Genkin 1889 - 1981
...................... +Simon (Samin) Glembot 1887 - 1964
............................. 4 Eugene Glembot 1920 - 1957
................................. +Florence Lapidus Living.
....................................... 5 Marjory (Margie) Glembot - Living
........................................... +Jerry Chadburn - Living.
.................................................. 6 Alissa Sarah Chadburn - Living
....................................... 5 Carol Glembot - Living
........................................... +Daniel Filtz - Living.
.................................................. 6 Michael Adam Filtz - Living
.................................................. 6 Rachel Anne Filtz - Living
....................................... 5 Robert (Bobby) Glembot - Living
........................................... +Toby Hanft - Living
.................................................. 6 Gabriel Simon Glembot - Living
........................................... +Pam Summers - Living
.................. 3 Louis (Lazar) Genkin 1890 - 1995
...................... +Elizabeth (Lisa) - Born 1890 in Chernigov, Belarus
............................. 4 Mary Henkin Living
................................. +Nathan (Nate) Hittelman Living
....................................... 5 Eugene Hittelman Living
........................................... +Joan ________
.................................................. 6 Naomi Hittelman - Living
...................................................... +Roby Abraham
.................................................. 6 Adam Hittelman - Living
....................................... 5 Martin (Marty) Hittelman - Living
.................................................. 6 Gregory Hittelman - Living
.................................................. 6 Karen Hittelman - Living
....................................... 5 Walter Hittelman - Living
.................................................. 6 Jason Hittelman - Living
...................................................... +Lenore _______
............................................................................. 7 Kimberly Hittelman - Living

............................................................................ 7 Amanda Hittelman - Living

.................................................. 6 Tara Hittelman - Living
...................................................... +(Tara's husband) ____________ - Living
........................................................................... 7 Tara's child #1 _____________ - Living

.................................................. 6 Camille Hittelman - Living
...................................................... +Camille's husband ____________ - Living
.......................................................................... 7 Camille's child #1 _______ - Living

....................................... 5 Lena Hittelman - Living
........................................... +Bruce Enenbach - Living
.................................................. 6 Hannah Enenbach - Living
.................. 3 Maxim Genkin 1893 - ?
...................... +Pauline _______ 1895 - ?
............................. 4 Victoria Henkin - Living
.................. 3 Morris Genkin 1893 - ?
...................... +Morris' wife _______
............................. 4 Herbert Henkin
....................................... 5 Deborah Henkin
.................. 3 Herman (Hymie) Genkin 1903 - ?
...................... +Herman's wife _______
............................. 4 Vera Henkin - Living
................................. +Gerald Baden - Living
........ 2 Nachum (Nathan) Henkin 1866 - 1898
............ +Sarah _______________
.................. 3 Morris Genkin 1877 - 1932
............ +Hilda (Hannah) Berlin 1872 - 1942
.................. 3 Ruby Henkin 1889 - 1977
...................... +Sadie Rincover 1897 - 1961
............................. 4 Norman Henkin - Living
................................. +Millie Trabin - Living.
....................................... 5 Bruce Henkin - Living
........................................... +Cynthia Hollos - Living
.................................................. 6 Joanna Henkin - Living
....................................... 5 Richard Henkin - Living
........................................... +Marlena Mouser - Living.
.................................................. 6 Jesse Henkin - Living
........................................... +Sonia Henkin - Living
.................................................. 6 Eric Shani - Living
...................................................6 Jordan Shani - Living
............................. 4 Morrie Ray Henkin - Living
................................. +Dorothy (Dee) Lapidus - Living
....................................... 5 Hilary Sue Henkin - Living
....................................... 5 Melanie Ranae Henkin - Living
........................................... +Greg Rose - Living
....................................... 5 Douglas Jeffrey Henkin - Living
........................................... +Linda Clergy - Living
.................................................. 6 Stephen Douglas Henkin - Living
.................................................. 6 Daniel Jeffrey Henkin - Living
.................. 3 Anna Henkin 1892 - 1992
...................... +Edmund (Emanuel) Kassan 1890 - 1973
............................. 4 Shirley (Sonia) Mildred Kassan - Living
................................. +Aaron Baer Koran 1913 - 1998
....................................... 5 Lorrin Michael (Larry) Koran - Living
........................................... +Stephanie Lynn Miller - Living
.................................................. 6 Joshua Ethan Miller Koran - Living
.................................................. 6 Jessica Jill Koran - Living
....................................... 5 Joyce Harriet Koran - Living
........................................... +Niel Spinner - Living
.................................................. 6 Joyleen Spinner - Living
....................................... 5 Dennis Howard Koran - Living
........................................... +Roslynn (Rollie) Cohen - Living
.................................................. 6 Michael Joseph Koran - Living
............................. 4 Lee (Leo) Kassan 1918 - 1993
................................. +Betty Kassan 1917 - Living
............................. 4 Melvin (Mel) Edward Kassan - Living
................................. +Norma Dworman - Living
....................................... 5 Allan Edward Kassan - Living
........................................... +Melissa Monell - Living
.................................................. 6 Allan Kassan's #1 Kid - Living
.................................................. 6 Allan Kassan's #2 Kid - Living
....................................... 5 Ronald Steven Kassan - Living
........................................... +Dana Levin - Living
....................................... 5 Lori Michelle Kassan - Living
........................................... +Howard Teichner - Living
.................................................. 6 Malone Teichner - Living
....................................... 5 Gary Michael Kassan - Living
........................................... +Marla Ivar - Living
.................. 3 Samuel Henkin 1893 - 1966 - Living
...................... +Minnie (Manca) Kechner 1903 - ?
............................. 4 Howard Henkin -
................................. +Cynthia ______ - Living
....................................... 5 Marla Henkin - Living
........................................... +Mr. Carroll - Living
.................. 3 Norman Nathan Henkin 1898 - 1965
...................... +Sarah Davidovna Sreberk 1910 - 1991
........ 2 Basha Genkin 1867 - ?
............ +Mr. Poze
.................. 3 Alta Poze 1908 - ?
...................... +Max Lapides 1901 - 1987
............................. 4 Louis Lapides - Living
............................. 4 Ruth Lapides - Living
.................. 3 Samuel Poze 1909 - ?
...................... +Marian _______
............................. 4 Susan Poze - Living
................................. +Mr. Krieger - Living
............................. 4 Abbie Poze - Living
................................. +Mr. Kapelovitz - Living
.................. 3 Morris Poze 1911 - 1980
...................... +Mildred _______
............................. 4 Tony Poze - Living
.................. 3 Bessie Poze 1914 - 1981
...................... +Bernard (Bernie) Drexler
........ 2 Brina Genkin 1868 - ?
.................+Brina's husband
.................. 3 (Brina's child #1) Genkin
.................. 3 (Brina's child #2) Genkin
.................. 3 (Brina's child #3) Genkin
.................. 3 (Brina's child #4) Genkin
........ 2 Nechama (Naomi) Genkin 1869 - ?
............ +Aron Mescheznikov
.................. 3 Basa (Bessie) Mescheznikov 1890 - ?
.................. 3 Moische Mescheznikov 1891 - ?
...................... +(Moische's wife) Mescheznikov
............................. 4 Basa Mescheznikov 1912 - ?
........ 2 Zevgenya (Henye) Genkin 1869 - ?