The story
- Old English · inherited fromeorldōm
- Middle English · inherited fromerldom
- English todayearldom
From Middle English erldom, from Old English eorldōm, equivalent to earl + -dom. Compare English jarldom. Cognate also with Scots eirldome, ȝerledom, erldom (“earldom”).
Etymology from Wiktionary, CC BY-SA 4.0.