Did Pedro Domingo Mutiñó sometimes use the pseudonym Domingo Santos?
No
Yes
Only for his early works
He considered it but never actually used it
Answer
Yes, Pedro Domingo Mutiñó used the pseudonym Domingo Santos. This pseudonym was first used by Mutiñó in 1889, and he continued to use it throughout his career. Mutiñó used the pseudonym Domingo Santos to publish articles in various newspapers and magazines.
Domingo Santos: A Journey into Spanish Science Fiction