Painter
Middle English: from Anglo-Norman French peintour, based on Latin pictor, from the verb pingere ‘to paint’.
wiktionary
From paint + -er, influenced by Middle French paintre.
Probably from Middle French pendeur.
From a variation of panther, by mispronunciation.
etymonline
painter (n.1)
early 14c., peintour, "artist who paints pictures," from Old French peintor, from Latin pictor "a painter," from pingere (see paint (v.)). Sense of "workman who colors surfaces with paint" is from c. 1400. As a surname, Painter is attested from mid-13c. but it is difficult to say which sense is meant. Related: Painterly.
painter (n.2)
mid-14c., "rope or chain that holds an anchor to a ship's side," probably from Old French peintor, ultimately from Latin pendere "to hang, cause to hang" (from PIE root *(s)pen- "to draw, stretch, spin"). Extended generally to "rope attached to the bow of a boat."