Irish in New Spain?

By accident I ran across a documnent in pars website where in 1798 the governor or Yucatan was "Arturo O'Niel."

http://pares.mcu.es/ParesBusquedas20/catalogo/description/64238?fbclid=IwAR1CFHOCadc0-a_aklXSND3IwhFZ-WzHMKrjygVZruiovebe1QCn8Lxx3xk

I looked him up in yahoo and find out that quiet a few Irish were serving for the spanish crown:

https://en.wikipedia.org/wiki/Arturo_O%27Neill?fbclid=IwAR3-RraF7lS1s5rab3exx27xLNUnk7xcexlZC9st9Fr3yopbaTEY-DJQzJ8