Barend Hartman van Groningen

Barend Hartman van Groningen was a Dutch Mennonite teacher and minister.
Barend served first in Haarlem at the Vlaamse Blok from 1761-1784, and later at the Doopsgezinde kerk, Haarlem from 1784-1806. During his service the congregations of the Haarlem Mennonite community were united in 1784 and the sermon on this occasion based on John 15:14 was given by his colleague Klaas van der Horst.
He was friends with Pieter Teyler van der Hulst and was named in his will as a member of the Teylers First Society, a position which he filled from 1778 until he died in 1806.