An Ancestry World Tree -- not the most reliable of sources, but in this case things seem to fit together. There was another Jacob Hummel, son of Andreas, in Berks County who stayed on in Berks after other family members moved to Northumberland County and who married a woman named Elizabeth and had a son named Benjamin.

He was born 14 Jul 1799 and died 13 Oct 1859. He married Rebecca Dietrich.