Isaac Tatem Hopper was born in Deptford Township, near Woodbury, West New-Jersey, in the year 1771, on the third day of December, which Quakers call the Twelfth Month. His grandfather belonged to that denomination of Christians, but forfeited membership in the Society by choosing a wife from another sect. His son Levi, the father of Isaac, always attended their meetings, but never became a member.