Olin is an English variant transcription of Olaf (Dutch, English, German, and Scandinavian).
Olin is also a familiar form of Oldrich (Czech).
Olin is uncommon as a baby boy name. At the modest height of its usage in 1903, 0.026% of baby boys were named Olin. It was #327 in rank then. The baby name has seen a marked drop in popularity since then, and is of only sporadic use now. Within all boy names in its family, Olin was nevertheless the most popular in 2018.
† Pronunciation for Olin: OW as in "oak (OW.K)" ; L as in "lay (L.EY)" ; EH as in "ebb (EH.B)" ; N as in "knee (N.IY)"