King Rollo’s Grandson: “RICHARD THE FEARLESS  had a grandson named: William Fitzponz.

Mister Fitzponz strategically; Changed his family’s name to: “DE-CLIFFORD” to effectuate being English. Thus  the “Barron’s de-Clifford”  and the above  “Clifford Castle” were born.  After, taking England, (some De-Clifford’s) changed that name to: “PLANTAGENET.”   The retrospective Plantagenet surname, most notably adopted by Richard, DUKE of York, in the mid-15th century was to separate and establish the HIGHEST CALIBER SIBLINGS FROM THE LOW CALIBER SIBLINGS.   IT SEPARATED THE “MOST QUALIFIED” LEADERS; AND PATRILENAL IDENTITY. (in short) All Clifford’s are Plantagenets.