They used to be with other traditionally itinerant ethnic groups originating from India: the Rom and Lom people.- Doms (Romani)
However, recent DNA testing has shown that the Irish Travellers are of Irish origin but are genetically distinct from their settled counterparts due to social isolation, and more groups are being studied.- Itinerant groups in Europe
They are one of several groups identified as "Travellers", a closely related group being the Scottish Travellers.- Irish Travellers
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The Romani (also spelled Romany, ), colloquially known as the Roma, are an Indo-Aryan ethnic group, traditionally nomadic itinerants.
Though often confused with them, the Romani people are culturally different from Irish Travellers and the Yenish people, two groups who may be related to each other.
The standard assumption is that the demonyms of the Romani people, Lom and Dom, share the same origin.