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: habitational name from a place in South Yorkshire near Rotherham, named in Old English with the genitive case of an unattested personal name Tynni + hlāw ‘hill’, ‘mound’, ‘barrow’. This name is also established in Ulster.