Article · Wikipedia archive · Last revised Jun 29, 2026

McDermott

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

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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

A

B

C

D

E

F

G

H

J

K

L

M

N

P

R

S

T

U

V

W

Z

See also

See also