A follower, supporter, or descendant of King David; one who adheres to Davidic principles or lineage.
From David with the suffix '-ist,' which creates nouns for followers of a person or doctrine (like 'scientist,' 'Buddhist,' 'socialist').
The '-ist' suffix is one of English's most productive affixes—you can attach it to almost any proper noun or ideology to name adherents, which is why we can instantly understand new words like 'Elon-ist' even if they're not in dictionaries yet.
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