Tammy, The only understanding of the family and or name is from the book written by Oliver C. Weaver Jr. in 1996. "The Yeldell Family of Merstham Parish, Surrey County, England,1552A.D., and Philadelphia, Pennsylvania, USA 1693A.D. Abbeville and Edgefield Districts, S.C. and Butler adn Wilcox counties, Ala.By Oliver C. Weaver Jr. Birmingham, Alabama 1996." He has done extensive research into this family and the allied families of Colonial Philadelphia, the Carolinas and Alabama.In it I quote from the preface "Two of the families described in this book settled on the Delaware River of colonial America in the late 1600s: Gorgius Hartsfelder, also known as Jurian Hartsfielder, was a residen of Marcus Hook in 1675, and Robert Yeldall settled in Philadelphia in 1693.He describes the Yeldalls English. Through his book he decribes Robert Yeldall the first generation in America. The first deed of Aug 8, 1693 was in Philadephia of Robert Yeldal.""There were many variations of the spelling. First Established as Yeldall, later as Yeldell." In this book he goes in great depth of rumors of the family being Welsh, but comes to conclusion, English roots. On page 4, he writes "Seven hundred years ago there lived in Devonshire, a county of southwestern England, a man named John de la Yaldelonde.Derived from the old English names"yealde," meaning old cultivated land." It was a place name transposed to a surname. In Devonshire similar place names such as Yalland, Yelland, and Yolland are common names which since the thirteenth century have been associated with various surnames including de la Yaldelonde and le la Yoldelonde.There also the name Youldon, meaning "dweller on the old hill," has similarly dunctioned as a place name and as a family surname. Phonetically, the names Yeldall and Yeldell appear to be derivatives of Yaldelonde."
My suggestion is to try to located the book in a library.