McDermott


title: "McDermott" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["anglicised-irish-language-surnames", "patronymic-surnames", "surnames-derived-from-given-names"] topic_path: "geography/ireland" source: "https://en.wikipedia.org/wiki/McDermott" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

McDermott or MacDermott is an Irish surname and the anglicised version of Mac Diarmada (also spelled Mac Diarmata), the surname of the ruling dynasty of Moylurg, a kingdom that existed in Connacht from the 10th to 16th centuries.

The last ruling king was Tadhg mac Diarmata, who ruled until 1585.

As a modern day surname, McDermott is mostly found in western Ireland and County Roscommon.

Some notable people with the surname are listed below.

Surname

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anglicised-irish-language-surnamespatronymic-surnamessurnames-derived-from-given-names