Hi Judy:

Here what little I found:

Domingo Perez Costa born abt 1895 arrived in New York on the “Mongolia” on 10 Dec 1920.
Birth location: Lousame
Port of departure: Vigo, Spain

Domingo Ramon Perez Costa born abt 1895 arrived in New York on the “Rousillon” on 22 Jul 1926.
Birth location: Tallara, La Coruna
Port of departure: Vigo, Spain

Have you seen this article written by Eddie Perez, grandson of Francisco Perez and Maria Costa?

http://www.miraclesofdattatreya.com/a-fathers-dream-comes-tr...

Reading the article led me to believe that Eddie Perez is in possession of a lot of documents or information regarding his ancestors.

Good luck.

Lucie