I have been looking on the internet this afternoon and not finding Russian/Polish dates to compare with American dates

What I have figured so far (just using hopeful common sense).  

Abram & Mejta  were born in the 1820s - 1830s in Russia/Poland.

They were married by 1846 because their eldest known child was born in 1847 in Russia.

On a piece of paper that I found next to her name is 2699 and next to his name is 2695.

Could they be birth years?   Death years?    Hebrew date year?   Russian/Polish date year?   

Any help will be appreciated

.

Thank you,   Trudy Barch,   Florida