The Jesus College MS. 20 Genealogies are a number of pedigrees found in Jesus College MS. 20, folios 33r to 41r.

The manuscript is of the late 14th century and is the largest surviving medieval collection of Welsh genealogical information. The forms of the names indicates a source prior to 1200. Parts of the manuscript are rubbed and dirty making reading difficult and parts of the text are corrupt.

The genealogies show a particular interest in south Wales and Morgannwg and contain much that is unique.


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