I don't know if you are still monitoring this board, but if you are, I can help a little bit...
My maternal grandmother was Maria de la
Concepcion Martinez-Dalmau. She had several siblings including the well known
Bishop of Cienfuegos, Eduardo Martinez-Dalmau. I am supposing you are a descendant of one of her brothers?
Her father was
Cecilio Martinez Seneriz
Osorio. He was born in
Arbon,
Province of Orviedo,
Asturias on January 18, 1853 and was the titular
Conde de
Osorio. He married
Sofia Dalmau y Barzaga of Bayamo, Cuba.
I have other information I can share with you including the names of Cecilio's and Sofia's parents -- my mother has several pertinent, well-preserved documents from Spain. Post here if you're still looking.
Regards,
Mario
Gutierrez