About Leopoldo de Aguiar
We know the name of Leopoldo de Aguiar and his wife Delfina González de la Vega from Juana Suarez de Aguiar and Rolando Gustavo de Aguiar.
The names of his brothers (and his surname) are dubious. We found a name of Leopoldo de Aguiar y de Rozas in a yearbook of a school in Havana; the dates were on target. Several brothers appeared there as well. But that maternal surname (de Rozas) does not match the full name claimed by Rolando Gustavo de Aguiar; to wit, Nuñez y Villavicencio.
For now it's probably best to think of as speculative both Leopoldo's maternal surname and the names of the brothers listed here.