English lunatic

← Middle English lunatik (inherited)

← Old French lunatique (derived)

← Proto-Indo-European *lewk- (root)

← Latin luna (derived)

→ English lunacy (suffix)

→ English loony (mention)

→ English loon (mention)

→ English moonling (mention)

→ English luny (mention)

→ English lunatical (suffix)

→ Arabic قمري (link)

→ Dutch droes (link)