IPA: /ˈfɔːrneɪm/
KK: /ˈfɔːrɪneɪm/
A name that comes before a person's last name, often used to identify them individually.
Her forename is Sarah, and her surname is Johnson.
Forename → It is formed from "fore" (from Old English *foran*, meaning before) and "name" (from Old English *nama*, meaning name). The word "forename" refers to a name that comes before the surname or family name.
Think of a name that comes 'before' ('fore') the family name — that's what a forename is.