Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
RICARDO
As described in historical dictionaries
Patronymica Britannica (1860)
RICARDO. David Ricardo, the celebrated writer on political economy, born 1772, was the son of a Dutch merchant. The surname is probably syuonj'mous with Richard.