α. Middle English reggewytth, Middle English rigwith, Middle English rugwitthe, Middle English rygwyth, Middle English rygwythe, 1500s ridgwyth; English regional (Cheshire) 1700s ridgewith, 1800s– ridgwith.
β. English regional 1800s ridgoth (Northamptonshire), 1800s– ridgerth (Cheshire), 1800s– ridgeuth (Cheshire).
γ. Chiefly English regional (north-west midlands) 1800s– ridgeworth, 1800s– ridgworth.