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.
Blanche's father
Abraham Schultz
b. 1884
d. 21 Jan 1960
Blanche's mother
Anna Dumes
b. 24 Mar 1900
d. 21 Oct 1983
They were married 15 Aug 1943.