Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
IV
We don't have any stats on how common this name is. This is probably because it's very rare in the UK.
Region of origin
Unknown
Country of origin
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Language of origin
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Religion of origin
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Classification
Unknown
Related and similar surnames
The Iv surname in historical dictionaries
Patronymica Britannica (1860)
IV. An upper story. V. A loft.