can you tell me more about the former?
It was a cadet branch of the English royal House of Plantagenet.
House of York
was a cadet branch of the English royal House of Plantagenet. 
what is county borough of leeds ? It was a local government district. where is it located? West Riding of Yorkshire, England what is the toponomy of the area? York comes from the Viking name for the city, Jórvík and the word "Shire" is either from the Old Norse word Skyr or from Old English Scir. how was their roman period? In the early 5th century, the Roman rule ceased with the withdrawal of the last active Roman troops. what happened in wars of the roses? House of York and the House of Lancaster both fought for the throne of England in a series of civil wars.
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House of York [SEP] Introduction
The House of York was a cadet branch of the English royal House of Plantagenet. Three of its members became kings of England in the late 15th century. The House of York descended in the male line from Edmund of Langley, 1st Duke of York, the fourth surviving son of Edward III. In time, it also represented Edward III's senior line, when an heir of York married the heiress-descendant of Lionel, Duke of Clarence, Edward III's second surviving son. It is based on these descents that they claimed the English crown. Compared with its rival, the House of Lancaster, it had a superior claim to the throne of England according to cognatic primogeniture, but an inferior claim according to agnatic primogeniture.