Can't really help you, but my family name is Manyx. There seems to be several variations in the spelling and the name is also the same as Minogue in Ireland. I have never been able to find out just how that worked.
Anyway, my grandfather (Michael) and his brother (Patrick) came from County Clare Ireland about 1854 as teenagers and located in the Schuyler/Brown counties of Illinois and a brother (John) remained on the east coast. I have never been able to find any trace of him, except I have family letters which indicate there was contact with him in the late 1800's or early 1900.s. I thought with all the info on the internet I would surely find them, but no luck. No luck in USA or Ireland.
Good luck to you.