Complex sentence: The rectory, which was considered a manor, was not owned by the church, so its owner appointed a vicar, in 1066 this was Ulmaer, who held it under Edward the Confessor.
Split into simpler sentences: The rectory, which was considered a manor, was not owned by the church. Therefore, its owner appointed a vicar in 1066 named Ulmaer, who held it under Edward the Confessor.