A pledge or oath
Gaige is a modern spelling variant of the Middle English surname Gage. It originally referred to a 'pledge' or 'surety', often used as an occupational name for a person who acted as a bondsman or one who assessed weights and measures.
Less common today
Gaige isn't in the latest US Top 1000. It last peaked at #782 in 2007.
Key figure in high-profile 2020 legal case
The Mechromancer character class Β· Borderlands 2
US births per 5-year period, 1990βpresent (SSA data).