Capo

google

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late 19th century: from Italian capo tasto, literally ‘head stop’.

wiktionary

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Shortening of capotasto, from Italian.

From Italian capo(“head, chief”).

etymonline

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capo (n.1)

"leader of a Mafia 'family,' " 1952, Italian, literally "head," from Latin caput "head" (from PIE root *kaput- "head").

capo (n.2)

"pitch-altering device for a stringed instrument," 1946, short for capo tasto (1876), from Italian, literally "head stop," from Latin caput "head" (from PIE root *kaput- "head") + tasto "key; touch."