Sir David Mathew
[5] Sir David was a zealous supporter of the Yorkist cause, whose extraordinary prowess and daring in the field, even at a very advanced age, were used on behalf of the White Rose of York.
[c] At the Battle of Towton, on Palm Sunday, 29 March 1461, although by then about sixty years old, he saved the life of Edward IV and was rewarded by his grateful monarch with the honour of Grand Standard Bearer of England.
[4] Browne Willis reported in his An survey of the Cathedral-Church of Landaff that Sir David was murdered in an altercation at Neath, West Glamorgan by some members of the Turberville family of Coity Castle.
The branch seated at Llandaff, thus the senior line, is generally ascribed Or, a lion rampant sable,[6] whilst the branch seated at Radyr, descended from Sir David Mathew's younger brother, is generally ascribed Sable, a lion rampant argent.
The arms of Radyr Sable, a lion rampant argent were supposedly adopted in honour of the White Rose, according to Rev Murray Mathew.
"In memory of Thomas James Mathew son and heir of Francis James Mathew second Earl of Landaff born in London 1798 died in Cape Town 1862".
The arms are blasoned: Or, a lion rampant sable .
Crest: A heathcock proper .
Supporters: Two unicorns rampant silver maned tufted hooved collared and chained or .
Motto: A Fynno Duw a Fydd ("What God wills will be")
