I am a descendant of a Jan Jans Somer and Hillegien Oltums via their son, Frederik Jans Zomer b. 2/1/1746 in Wildervank, Groningen, and via his daughter, Hillechien Fridriks Zomer (b. 2/2/1773 in Wildervank. She married a Harm Geuchies Koops (b. 1773) and the line changes names for me If you can read Dutch then there are two brothers whose website you must look at:http://members.home.nl/gerke.somer/ www.somer.be
I do not know how our Somer familie is connected to these Somer brothers' families yet, but we are trying to figure it out.
Also see the following Somer Dutch website:http://www.xs4all.nl/~hunter/Stambomen/Somer/Somer.html
If you haven't yet checked genlias.com, I would suggest that also. You can do that in English. It only goes back to about 1811 however, and because of so many different spellings of names I would suggest that you use only the first few letters of the last name or first initial of first name, if you have trouble finding the folks you want. Be sure to do all relationships, as you sometimes find unexpected things that way.