According to the 1897 census, he was a widower as of that year. His youngest child was one year old. This means his wife passed away between 1896 and 1897. It's possible that she died due to complications from the birth of her daughter Maria.
Child #4 Katharina Aab, age 20, resides in Tsaritsino
Child #5 Unnamed son, deceased
Wife of Child #5 Katharina Aab, widow, age 35, lives in Baku
Sources
↑1897 Grimm (Lesnoi Karamysh), Russia Census List, Translated by Richard Rye, Compiled and Edited by John Groh, Contributor Henry Schmick; American Historical Society of Germans from Russia, Lincoln, Nebraska, USA; Published 2017; page 1, family #93, Konrad Aab family.
Is Philipp your ancestor? Please don't go away! Login to collaborate or comment, or contact
the profile manager, or ask our community of genealogists a question.