Eduin is a variant of Edwin, from Old English, meaning "rich friend" or "prosperous friend."
Eduin is an archaic and graceful variant of Edwin, carrying its Old English skeleton intact: ead, meaning wealth or fortune, joined to wine, the Old English word for friend. Together the name promised something like a wealthy companion or a friend of prosperity — a fine thing to wish for a child in the fragile early medieval world where such names first flourished. Edwin of Northumbria, the seventh-century Anglo-Saxon king who converted to Christianity and was later canonized, gave the name its earliest prestige, and churches across northern England still bear his patronage.
The spelling Eduin, with its Latinate softening of the terminal w, appears in medieval manuscripts and ecclesiastical records, particularly in regions where scribes transliterated Anglo-Saxon names into a more Continental form. It surfaces in Irish and Scottish records as well, where the name blended with Gaelic naming traditions. This variant never achieved the mainstream saturation of Edwin, which made it feel scholarly and slightly rare even in eras when Edwin was thoroughly common.
Today Eduin is chosen by parents who want the solidity and history of Edwin with a quieter, less expected silhouette. It has a gentle visual elegance on the page and an easy pronunciation that requires no explanation. In Spanish-speaking communities it has found particular warmth, where the spelling aligns naturally with Spanish phonetics and the name's warrior-saint heritage lends it a dignified gravity.