

Her name MIGHT have been Kaila.
There are two fairly uncommon female names that repeat in the Margolis family in the early 19th century. I heard from a Margolis family researcher from Russia, very good analytical mind, who hypothesizes that one of those names is the name of Samuel's wife and the other is the name of Samuel's mother, the first Mordechai's wife.
Samuel's son, the second Mordechai, named one of his daughters Kaila and one Sulka.
Hypothesis is that the first Mordechai’s wife’s name was Kaila and that Samuel's wife's name was Sulka.
[She also might be the same person as the wife of rabbi Yosef, who could remarry after the death of Mordechai Margolis, leave Vilkaviskis and move back to Pruzhany with her younger children Asher and Itel (who later married there and not in the Suwalki area). The extremely high popularity of the name Keila/Kaila among descendants of Mordechai Margolis and Chana Zakheim since 1790s indicates that she might be the common ancestor of both branches and die old].
Kaila in the Margolis family
Mordechai’s aunt, Itel Margolis Prozner, had a great granddaughter Kaila b. 1830, so this is Kaila in a different branch than the Samuel branch. Itel was Samuel's sister.
Kaila in the Zakheim family:
Sulka in the Margolis family
Update June 2017: According to Neil Rosenstein, Vol I, Third Edition of The Unbroken Chain, page 42, fn 93, the wife of R. Mordechai Schick was born in Tykocin and settled in Vilkaviskis. This is taken from the HaMaggid obituary of Elijah Margolis, a descendant and Lithuanian rabbi and father of a dynasty of rabbis.
Sources
1705 |
1705
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Tykocin, białostocki, Podlaskie Voivodeship, Poland
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1725 |
1725
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1741 |
1741
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1745 |
1745
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1790 |
1790
Age 85
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