"There are about 20,000 Romani Americans (Roma) in Texas, out of a national population of about one million. Romani people, commonly known as Gypsies, have been in the Americas since 1498, when Columbus brought some on his third voyage to the West Indies."
Irish Travellers (Irish: Lucht siúil) are a traditionally nomadic people of Irish origin living predominantly in Ireland and Great Britain, with a relatively small number in the United States [10,000-30,000]. Among themselves, Travellers refer to themselves as Pavees. Derogatory terms are sometimes used to refer to them by non-Travellers, such as 'pikeys', 'knackers', and 'gypos'. In Irish, Travellers are called an Lucht Siúil (literally, "the walking people"). Many non-Travellers refer to the group as 'Itinerants' which means "people who travel from place to place" or 'tinkers' which originally meant "tinsmiths"; however, the latter term is considered derogatory.
Worlds apart and really different inter-culture; the Roma have ancestors still roaming from Turkey to India (I knew them as 'Kootchies" in Afghanistan, super hardcore nomads), not related to the Irish at all.
Brad Pitt was a Traveller in the movie "Snatch"...