More about fortuitous
Fortuitous “happening or produced by chance” ultimately comes from the Latin noun fors (stem fort-) “chance, luck.” Though chance and luck are not quite one and the same, the overlap between the two is why fortuitous evolved a second, more common sense of “lucky, fortunate.” Also derived from fors is the noun fortūna, which is the source of English fortune. The Roman goddess Fortūna was the goddess of luck as well as fate, and the Romans celebrated a festival in her honor, Fors Fortūna, annually on June 24. Note that Latin fors is not related to the English words forte “a person’s strength” and fortify “to strengthen against attack,” which come instead from Latin fortis “strong, brave” (compare Spanish fuerte). Fortuitous was first recorded in English circa 1650.