"Blend of Betty and Jo"
The name Bettyjo is commonly a female name from the "English" origin.
Bettyjo is an American compound name formed by joining Betty and Jo, both of which also occur as independent given names. Betty is an English diminutive of Elizabeth that has been recorded in England since the 18th century, and Jo is a short form of names such as Josephine and Joanna. The joined form appears in United States birth records from 1920.
The pronunciation of Bettyjo is BET-ee-joh.