The only free and comprehensive online etymological dictionary of the Spanish language
fin m. (Noun) "end"
12th cent. From Latin finis 'id.' Possibly from Proto-Italic *fīni- 'id.' Of an unclear etymology.
Feminine la fin is a pre-20th cent. poetic form. Also the origin of Fines, a town in Granada, so-called in reference to the town being along limits of the region's confines.
Asturian fin, Portuguese fim, Galician fin, Catalan fi, French fin, Italian fine, Sardinian fine