Of New Testament origin: from a post-classical Latin personal name, a feminine diminutive of the Roman family name Priscus ‘ancient’. Priscilla was the name of a woman with whom St Paul stayed at Corinth (Acts 18:3), referred to elsewhere as Prisca. The name was in regular use in the late 16th century and enjoyed a modest vogue in the 19th century.
Scottish and northern Irish: 1. Anglicized form of Gaelic Mac Gille Uidhir (Scottish), Mac Giolla Uidhir (Irish), probably ‘son of the sallow lad’. 2. Anglicized form of Scottish Gaelic Mac Gille Dheòradha, Irish Mac Giolla Dheóradha ‘son of the servant of the pilgrim’.