Spanish (Río), Portuguese, and Italian: from
río ‘river’, ‘brook’ (from Latin rivus), applied
either as a topographic name or as a habitational name from a place
named with this word.Southern French (Occitan): variant
of Rioux.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
62,519
Historical Documents & Family Trees with Rio
The information for this chart came from the U.S. Immigration Collection at Ancestry.co.uk.
You can find out where the majority of the Rio families were living before
they immigrated to the U.S and learn where to focus your search for foreign records.
Immigration records can tell you an ancestor's name, ship name, port of departure,
port of arrival, and destination.