Peter Heinrich Abraham Haag was born 27 December 1805 (baptized 3 January 1806) in Bredenscheid near Hattingen, Westphalia (Prussia). He was the son of Pastor Andreas Anton Haag and Johanna Maria Catharina Wortmann. He died in 1848 in Katharinenstadt. He married Amalie Henriette Otto, the daughter of Pastor Johann Martin Otto and Anna Katharina Filbert. She was born 4 January 1812 in Beideck and died in December 1868 in St. Petersburg.
From 1825 to 1826, he was a theology student in Dorpat, Estonia. He served from 1827 to his death in 1848 as the pastor of the unified parish in Katharinenstadt (North).
- Haag Peter Heinrich Abraham (wolgadeutsche.ru) (online)
- Schnurr, Joseph. Die Kirchen und das religiöse Leben der Russlanddeutschen – Evangelischer Teil (Stuttgart: AER Verlag Landsmannschaft der Deutschen aus Rußland, 1978): 139.