Sierra : 1: Spanish: habitational name from any of numerous places called (La) Sierra from sierra ‘ridge or chain of hills’ (from Latin serra ‘saw’). Compare Cierra.2: Catalan: Castilianized form of Serra a cognate of 1 above.3: Jewish (Sephardic): adoption of the Spanish surname (see 1 above) at the moment of conversion to Roman Catholicism. After the return to Judaism (generations later) some descendants retained the name their families used as Catholics.
Source : DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press
ncG1vNJzZmidnmO0prrEmqWerF6kv6h70q6pp5mdmsBwn6h%2BiYt5