When Gregorio Aguilar Pimentel was born on 26 November 1903, in Purépero, Michoacán, Mexico, his father, José Feliciano Donato Aguilar Martinez, was 34 and his mother, Alberta Pimentel Estrada, was 27. He married Rosa Valencia Guizar about 1923, in Michoacán, Mexico. They were the parents of at least 5 sons and 2 daughters. He died about 1969, in Michoacán, Mexico, at the age of 66.