Robert Mathew (Sir Mathew ap Ievan) "of Castell-Y-Mynach in Pentyrch, second son of Sir Mathew of Llandaff by Jenet Fleming; married Alice daughter and co-heir of Jenkin Thomas ap Evan David of Pant-Y-Corred ap Ll Ychan ap Ll ap Cynfrig, Lord of Llantrithyd, ap Howel ap Madoc, Lord of Ruthyn, ap Jestyn.  She was the heir of Castell-Y-Mynach."  The lineage of Alice, wife of Robert Mathew, is about the same as that of Cecil, wife of Sir Ievan.  Briefly, it is as follows:  Gwrgan, Lord of Glamorgan, had Jestyn ap Gwrgan, who had Madoc, Lord of Buthyn, who had Howel, who had Cynfrig, Lord of Llantrithyd and Radyr, who had Llewelyn of Llantrighyd, who had Llewelyn-Ychan, second son of Llewelyn ap Cynfrig, was Lord of Miscin.  He married Catherine, daughter and heir of Jevan Goch of Rhydlavar, and had Jevan, Constable of Miscin.

Robert Mathew, of Castle Menych, who married Maud, daughter of Thomas ap Howell, Lord of Brecknock.  His immediate descendant, Thomas (M.P. of the county of Glamorgan) appears in Peter Le Neve's MMS., together with David Mathew of Llandaff, as one of the Knights of the proposed Order Of The Royal Oak, in 1661; Cecil, daughter and heir to his grandson, Charles Mathews, of Henson and Castle Meynch (by Cecil, only daughter and heir to the celebrated loyalist, Judge Jenkyns), married Charles Talbot, Lord Chancellor of England, (Great-Grandfather to the present Earl Talbot), who was created, in 1733 Baron Talbot, of Henson, Glamorgan, younger sons of this branch became seated at Upton Grey and Alton, Hants County, and at Stansted Park, Sussex, of this latter line, Henry married Anne, daughter and heir of the Honorable Stanislaus Browne, brother to viscount Montagu; and his son, Francis about the year 1755.  Settled in Spain, where he left a numerous issue.  The great-grandson of Maurice Mathew, of Roos, second son of Robert, of Castle Menych, Tobias Mathew, Lord Archbishop of York, ranks deservedly among the most eminent English prelates.  His grace died March 29, 1628, and his son Sir Toby Mathew, M.P. for St. Albans, died unmarried in 1655

William Mathew, born 1439 in Castell-Y-Menych, Pentyrch, died 1509 in England, married Margaret Gamage.
Morgan Mathew, born 1431 in Saint-Y-Nyll, St. BridesSuperely, married (1) Sybil Kemmeys, (2) Isabel ferch Meyric, (3) Lucy ferch Jevin, (4) Nun ferch Howel.
Nun Mathew, 1427 of Castell-Y-Menych, married Howel ap Evan Griffith, 1370
Howel Mathew, born 1446 in St-Y-Nill. (No further information)
William Mathew, married Miss Dio, dau. of John Dio
Sir Thomas Mathew, born 1450 in Parson of St. Nicholas.
Elizabeth Mathew, born 1452, married (1) David Thomas, (2) Edmund Lloyd, (3) Griffith Howell.
Wenllian Mathew, married Richard Anderson of Penmark.
Felice Mathew, born 1454, married Richard Dio Prichard.
Morgan Mathew, born 1441

Robert Mathew, (1404) & Mawd verch Thomas, born 1409 in Lnatwadyfrynwysa, Aberqavenny, Monmouthshire, England, dau. of Thomas ap Llewelyn.  (No children found)