Family name Marnoch (Marnoch 
) , across the world, is a rare surname. The last name Marnoch is habitual in the United Kingdom, where it is a rare surname, New Zealand, and Australia. Measured by absolute frequency, it is the most numerous in the United Kingdom, Canada, and Australia. Very seldom, Marnoch is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marnoch | Australia, Canada, Thailand, United States, United Kingdom |
| alan marnoch Australian soccer player, GB (b. 1945) |
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| steve marnoch golf course architect (b. 1961) |
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| isobel marnoch Peerage person ID=488027 |
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| lachlan marnoch researcher (ORCID 0000-0003-1483-0147) |
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