have researched on the topic of Spanish migration to the Philippines and I realized that there were very very few Spanish migrants, direct from Spain who came to the Philippines. What did come in significant numbers though were the Latin-Americans. I tracked down some references from the web and these are the numbers which I found so far...
In the initial colonization, there were about 1200 Spanish families settled at Manila and 400 Spanish soldiers guarding them.
So considering that the average count of members per Spanish family were about 6 or 7 in the 1500s, that means that there would be a total of 8400 Spanish living in Manila at the 1500s alone.
Next, we go to Cebu City, at the Visayas, the settlement received a total of 2,100 soldier-settlers from New Spain (Mexico).
Now, if you add Cebu's Mexican population of 2,100 to Manila's population of 8,400 Spaniards, it totals to 10,500 Hispanics. Add to this are the Mexican soldiers stationed at Cavite which were a regiment and would number around 1000...
Adding these should amount to around 11500 Soldiers. To add to this would be the Peruvians settled in Zamboanga City as ordered by Don Sebastían Hurtado de Corcuera.
There is no exact number of them stated, what's only known is that there were a great many of them recruited and considering the transportation of that age, then the colonists would roughly be the same as the figure for the Mexicans settled in Cebu, which is 2,100.
Then, you would also add the Mexican settlers who settled in the Arrabales of Ermita, which was named because of a Mexican hermit which lived there.The community would count around a thousand Mexican settlers...
Adding them up would produce around 15,600 colonists during the 1500s (Most of which would be Latin-American in origin, Mostly from Mexico and with some contribution from Peru. There would be not much Spanish, there were very few Spaniards who directly migrated to the Philippines then).
So, during the beginning years of colonization, by the late 1500s, Mexico and Peru sent out a total of 15,600 soldiers and colonists.
15,600 won't seem to be alot to affect the Filipino population, however, we must bear in mind that there were also very few native Filipinos then.
Well...
I think the 15,600 Latin-American soldiers and colonists sent by Peru and Mexico to the Philippines could have adequately affected the 600,000 native Filipinos, in order to spread the European and Native American genes around, in a diluted form, as we see in genetic studies about Filipinos.
from selurong