Harmon was born sometimes in the late 1830s or early 1840s. His birthplace was likely Avonlea, Prince Edward Island. He was raised there along with his sister Isabella and they both attended the Avonlea school.
In the early 1860s he fell in love with his future wife. They got married and had together four children. A year after their wedding, Billy was born. In 1865, his wife gave birth to their daughter, Jane. Ralph and Gracie were born sometime in 1870s.
He had a field near Barry's pond.
Harmon is a male given name, variant of French name Harman and Old German name Herman and means soldier.