Sir Samuel Rush Meyrich, Heraldic Visitations of Wales and Parts of the Marches ...

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Sir Samuel Rush Meyrich, Heraldic Visitations of Wales and Parts of the Marches Between the Years 1586 and 1613 by Lewys Dwnn, Deputy Herald at Arms. Llandovery, 1846. Volume 1, p. 297. https://books.google.com/books?id=3t4_AAAAcAAJ&pg=PA297&lpg=PA297&dq=Cyveiliog+%22Rhiw+Saeson%22&source=bl&ots=xnBrQXqleu&sig=2xBX1LBwLwJ5MBdIeZzU_FagKF0&hl=en&sa=X&ved=0CCsQ6AEwA2oVChMIiPzy0InTxwIVxGw-Ch36BQtc#v=onepage&q=Cyveiliog%20%22Rhiw%20Saeson%22&f=false. Or this: https://archive.org/details/HeraldicVisitationsOfWalesAndPartOfTheMarchesBetweenTheYears1586/page/n324/mode/1up?q=Hundred+of+Cyveiliog

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