Larceny
late 15th century: from Old French larcin, from Latin latrocinium, from latro(n- ) ‘robber’, earlier ‘mercenary soldier’, from Greek latreus .
wiktionary
Coined in Middle English (as larceni) between 1425 and 1475 from Anglo-Norman larcin(“theft”), from Latin latrocinium(“robbery”), from latro(“robber, mercenary”), from Ancient Greek λάτρον(látron, “pay, hire”). [1]
etymonline
larceny (n.)
"theft; wrongful or fraudulent taking of the personal goods of another with felonious intent," late 15c., from Anglo-French larcin (late 13c.), Old French larrecin, larcin "theft, robbery" (11c.), from Latin latrocinium "robbery, freebooting, highway-robbery, piracy," from latro "robber, bandit," also "hireling, mercenary," ultimately from a Greek source akin to latron "pay, hire, wages," from a suffixed form of PIE root *le- (1) "to get" (source also of Greek latreia "worship, service paid to the gods, hired labor," latron "pay, hire," latris "servant, worshipper").
Perhaps with -y (3) added in English or else the word was altered by influence of burglary, felony. Formerly distinguished into grand larceny, involving property valued in excess of a stated amount, and petty larceny.