Putt
mid 17th century (originally Scots): differentiated from put.
wiktionary
From Middle Dutch putten(“to dig a hit”). The Old English putian(“to push; thrust; put; place”) derivation is commonly assumed, although no longer valid. In Dutch, the word is instanced in a description of golf in an early seventeenth-century edition of Pieter van Afferden's Tyrocinium linguae latinae. [1]
Onomatopoeic, from putt-putt.
putt (third-person singular simple present putts, present participle putting, simple past and past participleputt)
etymonline
putt (v.)
1510s, Scottish, "to push, shove, butt" (a sense now obsolete), a special use and pronunciation of put (v.). Golfing sense of "strike the ball gently and carefully" is from 1743. Meaning "to throw" (a stone, as a demonstration of strength) in this spelling is from 1724; this also is the putt in shot putting. Related: Putted; putting.
putt (n.)
1660s, originally figurative, "a putting, pushing, shoving, thrusting," special Scottish use and pronunciation of put (n.). Golfing sense of "to play with a putter" is from 1743.