Of uncertain origin. It is found in Old French as Yolande, of which this is a Latinate form. It may be ultimately of Germanic origin, but if so it has been altered beyond recognition. It is also sometimes identified with the name of St Jolenta (d. 1298), daughter of the king of Hungary.
English, French, German, Italian (Venetian), Polish, Czech and Slovak (Fabián), and Hungarian (Fábián): from a personal name, Latin Fabianus, a derivative of the Roman family name Fabius. The personal name achieved considerable popularity in Europe in the Middle Ages, having been borne by a 3rdcentury pope and saint.