I think I may have some interesting information for you. I just found this site and became very excited when I read your posting. I am working on my husbands side of the family at this time. I have a large amount of information; of which maybe of help & interest to you. I have a Lillie on his side who was a Sipma. Here is some of what I have.
Fathers name (this is Lillie's father) Sjoerd Aukes Sipma
Born: Aug. 18,1812 in Bornwird (Bornwerd?)Holland. He was married 3X's first 2 wives had passed away. He married wife #1 Jansje DeVries Wife #2 Boukje (Bertha) (Bruinia) Boonstra
Wife #3 Katharine DeBoer (Mulder). I tell you this so that it may be of some help. Wife #2 Would of been Lillie's mother.
My Lillie's Dutch name is Hiltje Sipma Born: Nov. 28,1864 in Pella Marion Co. Iowa. Not sure if I was of any help to you. If so please contact me.