I'll never be able to add all this to my page so let me know if your looking for a specific Percy/Pearce/Pierce and I will check my database. (LisaHnwlt)  Ill give you a run down on descendents.  I'll start with Hotspur and work my way forward- I have more details- just adding minimum information.
This will be a direct line so just follow straight down.

Henry De Percy was born May 10, 1364 ( HOTSPUR)
Henry De Percy was born February 03, 1390/91
Ralph Percy
Peter Percy
Richard Percy
Richard Percy II
Capt. William Pearce married Jane Eeles
Thomas Pearce
George Pearce
William Pearce
George Pearce b. about 1730
George Gadwell Pearce, Sr. b. Abt. 1755
Wiley Pearce b. 1772
John Madison Woods Pearce b. March 20, 1805
Marcus Alonzo Pearce b. 1831
William Marion Pearce b. 1862 d.1944  married  Annie Johnson b.1865 d.1960
Ralph Pierce
Ollie Pierce
Jim Pierce
Viola Pierce
Ruth Elmax Pierce
Lela Pearce
Otto Pierce
Maud Eliza Pierce b. 1892 married Cullen Grant
Weldon Grant b. 1912
Maurice Eschol Grant b. 1919  d. 1987
Berta Imogene (sis) Grant
Clyoma Ottie Grant
Myrna Frances Grant
C.E. Grant
Garland Gayle Grant

Once again my database of Pearces is way to large for me to even try and print it so this is just a direct descendent list. There is more info on Pierces on page 18 &19.  If you have any questions, please email me!