I am a decendant of William Henry McGhay, I didnot know of the spelling change of the name from McGaughey. I haven't been able to learn where in Ireland they came from. The census records in Platte County 1850 just shows that he and his wife Elizabeth Murdock came from Ireland. I have found the surname McGhay in church records in Glasglow, Scotland in the 1850,s. Do you know at what point the name change took place?