There is an interesting report on the charity school online:

http://books.google.com/books?id=xzPFF_mGLUMC&pg=PA339&lpg=PA339&dq=santurce+boys+charity+school&source=web&ots=9OUwBumk18&sig=Uja5gDvhIB7k_v5hFhKZaTHT1UM#PPA337,M1

I would check for marriage records in Santurce.

Could this be Carmen?

Name: Carmen Meranda Oten
[Carmen Miranda Otero]
Age in 1910: 6
Estimated birth year: abt 1904
Birthplace: Puerto Rico
Relation to Head of House: Daughter
Father's name: Juan
Father's Birth Place: Puerto Rico
Mother's Birth Place: Puerto Rico
Home in 1910: Mercado, San Juan, Puerto Rico
Marital Status: Single
Race: White
Gender: Female
Neighbors: View others on page
Household Members: Name Age
Juan Meranda Roman 58
Juan Meranda Oten 22
Ernesto Meranda Oten 19
Teodomoro Meranda Oten 17
Rafael Meranda Oten 14
Ana Meranda Oten 11
Carmen Meranda Oten 6
Fernando Velez 29