The name Rosas appears in old documents having as synonyms Rasa, or Resa Rasal.

The surname Rosas is originally Andalus as one of the first known with this name is Tomas de Resa who was born in Seville, legitimate son of Don Juan and Dona Ana Resa del Toro. The knights always distinguiron Rosas surname in the war against the Moors by his bravery.

The name Rosas was later extended to Catalonia and Spain, where after all contracted alliances with other lineages as were Chacon, Luna, Vergara, Gutierrez and Carvajal.