This American surname Mefferd is a variant of German and Dutch surname: Meffert.
There could perhaps be of English origin. Perhaps a variant of Rare English surname Mefford, which is perhaps could be a variant of English surname Maddaford of Devon, Medfordperhaps from Yorkshire, or Mitford of Northumberland.
See related links below for more info.
Spanish
Germany
It is Spanish.
It's French
Spaniard, italian and celtic origin.
This surname Olsen is of Danish and Norweagian origin.
This surname Bombardier is of French and Italian origin, the surname is mostly found in Canada.
Spanish
Penilla
Ferreira is a Portuguese and Galician surname.
I believe it is armenian.
Italian
England
Germany
It is Spanish.
Armenian
This surname Sansanwal is an Indian name who are descendants of the Jat people.