My grandfather was an only son, but he had 12 children:
Fermin - No Children
Josefa -No children
Benito - His children: Magaly Rolando Arturo Caridad
Gabriel - one son: Juan Manuel Alamo
Feliciano - his children: Armando Alamo Marie Elena Alamo
Ofelia - No children
Tomas - One son: Tomas
Armando - no children
Pilar - one son: Orlando de Quesada
Maria de Socorro - No children
Miguel - No children
Eulelia - No children
My grandparents met and married in Cuba.My grandmother was from Galicia, Maria Pilar Perez Osorio.
The oldest son, Fermin, was born in Cuba.The rest were born in Merida, Mexico.They moved to Mexico when Spain lost the war of 1898.When my father was fourteen, they moved back to Cuba to Puerto Padre, Oriente.They lived there until the late 1930's and early 1940's when they all moved to New York.
I have this Alamo line back to the 1700's.
I hope this helps to see if there is a connection to your line.