A chief or principal earl; the most important earl in a territory or organization.
From Old English 'arce-' meaning 'chief' or 'principal' combined with 'earl,' a nobleman. This compound reflects Medieval English hierarchy where 'arche-' prefixes denoted supreme rank.
Medieval rulers loved stacking titles to show power, and 'archearl' is one of those forgotten super-titles that didn't quite stick around. If you ruled over other earls, you weren't just an earl—you were an *arch*earl, kind of like being the earl of earls!
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