Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
We don't have any stats on how common this name is. This is probably because it's very rare in the UK.
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Related and similar surnames
The Arini surname in historical dictionaries
Patronymica Britannica (1860)
ARINI. Appears to have been an .ancient personal name. It is found in comjosition with the local surnames, Armfield, Annstead, 2\.rmsby, Armsworth, &c.