Where did the last name Chamberlain come from?

The last name Chamberlain comes from Old French and Middle English occupational origin, meaning someone who managed a chamber or private household, derived from French chamberlain and Latin camerarius. Chamberlain surname originated in medieval England and France as occupational name for a chamberlain, who was high-ranking official in charge of managing lord's chambers, household, finances, and often treasury, similar to modern chief of staff or steward. The word comes from Old French chamberlenc, from Old High German kamarling, from Latin camera meaning chamber or room. In England after Norman Conquest in 1066, Norman French brought term, and Chamberlain became surname for those holding office of chamberlain in royal court or noble household. The royal office of Lord Great Chamberlain still exists in UK. Variations include Chamberlin, Chamberlayne, Chamberlan. The surname spread across England, especially in Oxfordshire and Gloucestershire. In US, Chamberlain families descended from early English immigrants. Notable Chamberlains include Neville Chamberlain, British Prime Minister, Wilt Chamberlain, basketball player, and Richard Chamberlain, actor. So last name Chamberlain comes from medieval occupational title for manager of chambers, from Old French chamberlain, Latin camerarius, meaning chamber servant, indicating ancestor was steward or household manager for nobility.