middle name · noun1
First recorded from Harvardiana in 1835.
middle name · noun2
Historically in the Spanish colonial era of the Philippines, the Spanish naming customs traditionally displayed the full name as: : first name + second name + father's surname + Spanish y (“and”) + mother's surname During the US colonial era of the Philippines, the US naming custom took effect where the mother's maiden name is used as a middle + name, which displayed the full name as: : first name + second name + middle name (“mother's surname before marriage”) + last name (“father's surname”)
Etymology from Wiktionary, CC BY-SA 4.0.