What's the exact location of Bose?
Bose is in modern-day Gmina Sejny, and it was in Gubernia Suwalski from 1866 on. Also, the DNA test sort of helps and sort of does not help, since I'm mixed and a lot of Jewish atDNA currently shows up as Eastern European on Ancestry.com. Additionally, I got some matches, though some of the relationships are quite a bit misestimated. e.g.,
1) Kevin Czarnecki [Granduncle Tony's son, unless he's the other Kevin. In that case, he'd still be a once-removed cousin, given that Granduncle Red would be his grandfather and Robert, Sr. his son.]
2nd-3rd Cousin [Actually, once-removed first cousin either way.]
Shared DNA: 229 cM across 9 segments
No Trees
Father's Side
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2) Stephen Czarnecki [Granduncle Tony's son.]
2nd-3rd Cousin
Shared DNA: 278 cM across 18 segments
No Trees
Father's Side
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3) Chris Horoschak [Great-Grandaunt Celia's grandson through her daughter Alexandria "Sandy" Horoschak.]
4th-6th Cousin [Actually, once-removed second cousin. Sandy is Pop-Pop's cousin, and thus Chris is Dad's second cousin.]
Shared DNA: 59 cM across 6 segments
No Trees
Father's Side
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I forgot why Chris got some matches to some Trudnaks outside of the Czarnecki Trudnaks at first, by the way: Valerie Czarnecki married Great-Grandma Czarnecki (nee Trudnak)'s brother John.