Etymology of the Icelandic word fínn

Cognates

Catalan fi, Danish tynd, Dutch dun, Dutch fijn, English fine, English thin, French fin, German fein, German dünn, Icelandic þunnur, Icelandic Tunnur, Italian fine, Italian fino, Latin finis, Norwegian fin, Nynorsk tynne, Portuguese fino, Portuguese fim, Provençal fin, Riksmal tynn, Spanish fino, Spanish fin, Swedish tunn, Swedish fin