Learn how to say Guelphs correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Guelph:
1a member of one of two great factions in Italian medieval politics, traditionally supporting the Pope against the Holy Roman emperor. Compare with Ghibelline.
2a member of a princely family of Swabian origin from which the British royal house is descended through George I.
from Italian Guelfo, from Middle High German Welf, the name of the founder of one of the two great rival dynasties in the Holy Roman Empire