MCISAAC
Recorded variant spellings include Mc Isaac, Mcisaac
McIsaac is a Scottish surname of patronymic origin that indicates descent from an ancestor named Isaac. The name is constructed from the Gaelic Mac Ìosaig, literally meaning \"son of Isaac\". This construction follows a common Celtic convention for indicating lineage.
Isaac itself is a Hebrew personal name derived from the root tsachak, which means \"to laugh\". In biblical tradition the name is associated with the laughter of Sarah upon receiving a child. The Hebrew name was rendered into Greek as Isaak and subsequently Latinised to Isaac, from which the patronymic surname has evolved.
Records of the name can be traced back to the medieval period. The Domesday Book of 1086 includes the bare form Isac, and in 1154 the prior of Scone is recorded as Isaac. In 1178 a charter witness at St. Andrew's, Scotland, is named Ysaac of Brechin. These early attestations record the use of the personal name within Scottish ecclesiastical contexts.
The first known appearance of the Gaelic patronymic form occurs in the early 13th century. The charter of the Priory of Beauly, dated 1231, lists a witness named Gillanders Macysac, confirming the surname’s usage during the reign of King Alexander XI (1214‑1249). This document is the earliest extant source naming the surname in its patronymic Gaelic form.
The surname is concentrated mainly in the Highlands and Islands of Scotland, reflecting its origins within traditional Scottish clans. Variants of the name appear in Ulster under the spellings MacKissock and MacKissack, showing the spread of the surname beyond Scotland.
A further illustrative record is the birth on 27 March 1732 of a daughter, Mary, to Neil McIsaac and Mary McClean in Edinburgh, Midlothian. This entry demonstrates the continued use of the surname into the 18th century within the Scottish urban context.
In sum, the surname McIsaac is firmly rooted in Scottish Gaelic patronymic tradition, deriving from the Hebrew name Isaac which means \"he will laugh\". Its history is documented in both ecclesiastical records and secular charters from the late 11th to early 13th centuries, and it retains a presence in the Highland and Island populations, with noted variant spellings in the Ulster region. The name’s continuity over centuries illustrates the enduring nature of patronymic surnames within the British Isles.
Typical given names associated with the McIsaac surname
Male
- Albert
- Angus
- Brian
- Colin
- Craig
- David
- Duncan
- Graham
- Ian
- James
- John
- Neil
- Robert
- Stuart
Female
- Alison
- Angela
- Catherine
- Deborah
- Elizabeth
- Esther
- Katherine
- Kelly
- Margaret
- Mary
- Maureen
- Rachel
- Sallie
- Sandra
Similar and related surnames
Related and similar names are generated algorithmically based on the spelling, and may not necessarily share an etymology.
How to communicate the surname McIsaac in...
Braille
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Morse
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There are approximately 223 people named McIsaac in the UK. That makes it one of Britain's least common surnames. Only around three in a million people in Britain are named McIsaac.
Surname type: From name of parent
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic
Famous people named McIsaac
- Billy McIsaac - Musician
Names and descriptions courtesy of Wikipedia, and may contain errors. This is not intended to be an exhaustive list of every famous person with this name.