Murdock
A surname usually understood as a Gaelic form of Murdoch, meaning “sea-happy” or “prosperous at sea.”
The #1,804 most common surname in the United States (2010 Census) — about 1 in every 15,536 Americans shares it.
Etymology
Murdock is generally treated as a variant spelling of Murdoch, from Gaelic elements often given as muir, meaning “sea,” and adhach, meaning “happy,” “fortunate,” or “prosperous.” Older sources also connect the surname with Irish forms such as Murtagh/Murdoch-type names, so there may be more than one historical pathway into English spelling. The literal sense is usually explained as something like “sea-fortunate” or “sea-happy.”
History
The name is well established in Scotland and also appears in Irish records, with spellings varying widely as English clerks wrote Gaelic names phonetically. In North America, Murdock became the common Anglicized form for many families descended from Murdoch or related Gaelic surnames. The spelling has also been stabilized in modern usage as a distinct surname.
Origin
Regions
Variant spellings
Fun fact
A few 19th-century surname writers glossed the name very poetically as “sea-happy,” which is why it is one of the more memorable Gaelic surname meanings.
From the historical record
“MURDOCH! (Celt.) Sea-Happy [Gael, and MURDOCK J Ir. Mu{t)readhach—mu{i)r ,sea-f- ' adhach, happy, prosperous, lucky] MURGATROYD 1 (Gr. + Scand. ) Bel. to MURGITROYD f Murgatroyd (Yorks), 14th cent. Mergretrode = Mergret's or Mar- garet's Clearing [v. Margaret and Royd] MURISON I Murray's Son: v. Murray'.”
— Surnames of the United Kingdom: a concise etymological dictionary (2 vols in 1)