This is sort of a hobby of mine to try to trace back my ancestry to it's origins in Spain. My Paternal origin leads me to believe that it is Spanish and that it would be somewhere in the Bilbao area as there are a lot of Eraña's there.
There are two Eraña trees in the Philippines as far as I can tell and they are related. The other Erana's I have found were from South America with decendants who did emigrate from Spain.
I was born in the Philippines and grew up in Western Canada, and now work and raise my Family in South Jersey/Philadelphia.
Looking forward to finding others with the same surname as it seems to be quite limited...
Cheerful Regards,
Michael (Miguel) Eraña