What was the name of Gregor Mendel's father?

Gregor Mendel's father was Anton Mendel. Anton was a farmer in Heinzendorf bei Odrau, a Silesian village then part of the Austrian Empire and now known as Hynčice in the Czech Republic.

The Mendel family farm had been in the family for at least 130 years. Anton worked the land and maintained an orchard, including grafted fruit trees. His practical experience with cultivation likely gave young Johann Mendel an early familiarity with plant variation, although Mendel's later genetic discoveries came from carefully controlled pea experiments rather than from family farming alone.

Mendel was born Johann Mendel in 1822 and later took the religious name Gregor when he joined the Order of Saint Augustine. His mother was Rosine, née Schwirtlich, and he had sisters including Veronika and Theresia. A common mix-up is to confuse Anton Mendel with Johann Karl Nestler, a university professor whose research on heredity influenced the intellectual environment Mendel encountered. Anton was Mendel's father; Nestler was an academic predecessor and influence.