Named, I'm assuming, for John Milton? That so-called poet and all-around horrible person that even Samuel Johnson considered an "acrimonious and surly republican"? It's his Paradise Lost we have to thank for the scourge of "blank verse"! Oh, the humanity! Also he supported and served under Cromwell, of all people! Surely we can throw this horribly-named compiler on the dustpile of computer science history!?
Only because there weren't that many people in the vicinity! A large portion of those who did have the misfortune to be there got killed, though; estimates are that about 15-25% of the Irish population was killed. https://en.wikipedia.org/wiki/Cromwellian_conquest_of_Irelan...