What is the meaning of -ard?

Someone who is in a specified condition (“pejorative agent suffix”).

-ard (someone who is in a suffixed condition)

-ard appended to placenames to form nouns meaning “one who is of, from or related to a place”

appended to nouns to form adjectives characterising someone or something as characterised by that noun

appended to placenames to form relational adjectives meaning “of, from or related to a place”

forms pejoratives, diminutives, and nouns representing or belonging to a particular class or sort

Forming pejorative agent nouns from other nouns; -ard.

Source: wiktionary.org