Dumes.Net
A website dedicated to the family of Chaim and Sadie Silk Dumes from Viski, Latvia
Dumes.Net
At the top of the tree are brothers Chaim (A), Jossel-Leib (B) and Schender (C). Each generation adds a letter; the letter represents your birth order, A for the 1st, B for the 2nd, etc.
So Sarah, first child of Chaim, is AA. Her husband, Jacob Kaplan, is Aa, the lower-case a indicating that he married into the Dumes family.
I've also used the lower-case letter for my two step-sons to indicate a non-bloodline Dumes relationship.
Hyman's father
Jacob Kaplan
b. 1881
d. 31 May 1946
Hyman's mother
Sarah Dumes
b. 14 Sep 1881
d. 08 Sep 1945
According to Lila Kaplan, Hy was actually named Joseph and was given the nickname Chaim when he survived pneumonia as an infant.