"The Early Life of William Herbert, Earl of Pembroke (d. 1570)" by S.J. Gunn and W.R.B. Robinson, Welsh History Review, Vol. 18, no. 3 (June 1997), pp 509-519.
excerpt (510-511): "His father, Richard Herbert, esquire, of Ewias and Abergavenny, an illegitimate son of William Herbert, Earl of Pembroke (d. 1469), had died in 1510. Sources differ as to the exact number of children Richard fathered...."
↑#S001747; #S001744; m. abt. 1505 Swansea, Glamorganshire, Wales; #S001735; Aug 18, 2011 by Lawrence Schliessmann. S001697 Ancestral File (R): The Church of Jesus Christ of Latter-day Saints Publication: Copyright (c) 1987. Note NS016973: Family History Library 35 N West Temple Street Salt Lake City, Utah 84150. HERBERT(11).FTW