My son is named
Finley and called
Finn about 75% of the time. He gets compliments on it a lot. I'm too close to him to form an opinion. I will say I think it absolutely stands alone. I already had a son with a longer formal name and a one syllable nickname, so I followed suit with my
Finn. Otherwise, I may have just named him
Finn.
Oisin is ok. I like the look of it more than the sound.