The first occurrence of the surname "Ignacio" in the Dominican Republic (when it was only Hispaniola) was documented by two families from Le?n in Spain.
The first family being the result of the head assigned a clerical job from Le?n y Castilla and the second a family of which the head was a merchant.
Given the fact that after Spain colonized the island quite quickly, it's a given that many more people with the same surname made the Spanish colony their home as well.