I'm trying to sort out the connection between some Dunns and my Carson line.

There's a Carson family plot in Ivy Hill Cemetery, Philadelphia that has my gr-gr-grandparents, Edward Carson (d. 1918) and Martha Johnson Carson (d. 1907) in it. Buried with them are a brother, Charles Carson (d. 1891, age 67), a daughter, Oella Dunn Carson (d. 1937, age 72) and a son, William Carson (d. 1885, age 31).

Also buried there are two people named DUNN, and I have no idea how they are connected to the family:
Harry E DUNN, age 11 mo, interred Jan 10, 1891 - est YOB: 1890
Clifford DUNN, age 79, interred Feb 20, 1947 - est YOB: 1868

Given that Edward and Martha gave their daughter the middle name of "DUNN", I'm guessing it's a maternal family name but with the name Johnson being common, I've not had any luck tracing the line.

Other possibly useful information: Martha was born in Ohio abt 1836 and was in Philadelphia by 1850 or so, as she and Edward married in 1850/51.

Please contact me if you have any information. Thank you!