My great-grandfather Nathan Paderefsky is listed in the 1900 New York census with
his wife and children and, along with them is Jacob, a brother. Nathan in 1900
was 38 years old, Jacob is listed as 20 years old - a difference of 18 years!
That is not an extraordinary.gap. My paternal grandparents had 9 children, all of
whom survived. The oldest was born in 1883/4 in what is now Belarus. The youngest
was born in 1905 in London, at least 21 years between them.