-ard

1.
a suffix forming nouns that denote persons who regularly engage in an activity, or who are characterized in a certain way, as indicated by the stem; now usually pejorative:
coward; dullard; drunkard; wizard.
Also, -art.
Origin
Middle English < Old French, probably extracted from Frankish compound personal names; compare Old High German Adalhart (French Alard), Bernhart (French Bernard), with 2nd element -hart literally, strong, hardy, hard (cognate with Old English -heard in names), often merely as intensifier of quality denoted in 1st element.
British Dictionary definitions for -ard

-ard

suffix
1.
indicating a person who does something, esp to excess, or is characterized by a certain quality: braggart, drunkard, dullard
Word Origin
via Old French from Germanic -hard (literally: hardy, bold), the final element in many Germanic masculine names, such as Bernhard Bernard, Gerhart Gerard, etc
Word Origin and History for -ard

also -art, from Old French -ard, -art, from German -hard, -hart "hardy," forming the second element in many personal names, often used as an intensifier, but in Middle High German and Dutch used as a pejorative element in common nouns, and thus passing into Middle English in bastard, coward, blaffard ("one who stammers"), etc. It thus became a living element in English, e.g. buzzard, drunkard.