Rainier Family History
Rainier Name Meaning
Altered form of French Regnier a cognate of 2 below. Compare Rainear Rainer Rinear Rineer and Rinier . In some cases possibly also French: from the personal name Rainier from ancient Germanic Raginhari composed of the elements ragin ‘counsel’ and hari ‘army’. This surname which is a variant of Reinier is very rare in France.
Source: Dictionary of American Family Names 2nd edition, 2022