This is in Andrew N. Adams book
FAIR HAVEN, Vt., Jan., 1898.
ANDREW N. ADAMS.
THE AP ADAM PEDIGREE.
It has been assumed that Henry Adams was of Welsh origin, the sixteenth generation from Ap Adam, the father of John, or Lord Ap Adam, who was called to Parliament by Edward I., as "Baron of the Realm," from A. D. 1296 to 1307, and that he came out of the Marches or Borders of Wales into Devonshire.
This ancient pedigree was furnished by William Downing Bruce, Esq., F. S. A., who says, "It is copied from an ancient parchment roll, with arms, of the time of Charles I., which I discovered among the papers of the late Hamlin Adams, Esq., of Middleton Hall, M. P. from the county of Carmarthen."
It was first published in this country in the New England Historical and Genealogical Register, Jan., 1853, Vol. VII., p. 39-40, and is as follows:
ams BookAP ADAM;
Sir John Ap Adam2, Kt., Lord Ap. Adam; m. Elizabeth, dau. of Sir John Gourney of Beverstone and Tedenham, Gloucester. Residence several generations at Charlton, Gloucester.
Sir Thomas Ap Adam3, and others;
Sir William Ap Adam4.
Sir John Ap Adam5.
Thomas Ap Adam6.
Sir John Ap Adam7, Kt., m. Milicent, dau. of Sir Matt. Bisylls.
Sir John Ap Adam8, alias Adams; m. Clara, dau. of Mr. Roger Powell.
Roger Adams9, m. Jane, dau. of (???) Ellyott.
Thomas Adams10, m. Marie, dau. of Mr. Upton.
John Adams11, m. Jane, dau. of Mr. Rennelegh.
John Adams12, m. Catherine, dau. of Mr. Stebbing.
Nicholas13, m. and had no issue; John13, m. Margerye, dau. of Mr. Squier. George13, m. and had issue.
Richard14, (son of John13) m. Margaret, dau. of Mr. Armager.
Robert15, m. Elizabeth Sharlon.
George16; Henry16; Ambrose16; John16.
This pedigree is thought by good judges to be correct, and genuine, as far as Nicholas13,--"a mere transcript of the record made by the Heralds in their Visitation of Devonshire, 1564." "This Visitation Pedigree, however, ends with Nicholas13, who married and had no issue. No brothers of this Nicholas13 are given. . . The rest of the Pedigree beginning with John, brother of Nicholas13, is an addition by somebody." Col. Joseph L. Chester, LL. D., an American genealogist of high rank, resident in London, wrote [See New Eng. Historical and Genealogical Register, July, 1877; Vol. XXXI., p. 333], "I have no hesitation in pronouncing the portion connecting the English family with the Braintree Adamses utterly incorrect."