Sharon, you must do your homework. I cannot tell you how many hours I have wasted following someone's genealogy (where I have a common ancestor) only to find that the genealogy posted is wrong. I am finding that the genealogies posted in WorldConnect on RootsWeb have about an 80% error rate. Look at Genealogics (use google), it is considered one of the better sites for royalty and nobility. See also ANCESTRAL ROOTS OF CERTAIN AMERICAN COLONISTS WHO CAME TO AMERICA BEFORE 1700, by Frederick Lewis Weis (now in 8th edition).
See also the following for more help in researching medieval and noble ancestors:
GENERAL “HOW TO” OR BACKGROUND INFO:
Bird, Jack. "Some Sources for French Genealogy and Heraldry." The Genealogists' Magazine 13:8 (December 1960): 237-241.
Bouchard, Constance B. "Consanguinity and Noble Marriages in the Tenth and Eleventh Centuries." Speculum 56:2 (1981): 268-287.
Interesting discussion of consanguinity among the nobility and the impact of the Catholic Church's changing rules. Consanguinity often becomes a crucial issue when trying to untangle possible relationships among Medieval people.
Durye, Pierre (trans. By Wilson Ober Clough). Genealogy: an introduction to continental concepts. New Orleans: Polyanthos, 1977.
Lart, Charles E. "French Noblesse." The Genealogists' Magazine 7:5 (March 1936): 229-242.
Medieval genealogy: how to find your medieval ancestors by Paul Chambers
Feudal genealogy by Walter Lee Sheppard, Jr.
Records & record searching: a guide to the genealogist & topographer, by Walter Rye
DICTIONARIES & OTHER REFERENCE TITLES:
Central European genealogical terminology by Jared H. Suess.
Dictionnaire des fiefs, seigneuries, chatellenies, etc. de l’Ancienne France, by Henri Gourdon Genouillac (1862). (google books)
List - like a gazetteer.
A to ZAX: a glossary of terminology for genealogists and social historians, by Barbara Jean Evans.
The Genealogist’s encyclopedia, by L.G. Pine
Medieval wordbook: more than 4,000 terms and expressions from medieval culture, by Madeleine Pelner Cosman.
A Manual for the genealogist, topographer, antiquary, and legal professor, by Richard Sims (google book)
Bouillet, M.-N., Atlas de universel d’histoire et de geographie. Librarie de L. Hachette et Cie., 1865. (google book)
Innes of Learney, Thomas, Scots Heraldry. A practical handbook on the historical principles and modern application of the art and science, Genealogical Publishing Co., 2nd ed., repr. 1973.
Louda, Jiri. Heraldry of the royal families of Europe. New York: Clarkson Potter, 1981.
A great book for armchair browsing and background reading. The information in the charts is unexceptional, but they are accompanied by full-color blazons.
Palliser, Bury (Mrs.). Historic devices, badges, and war-cries. London: Sampson Low, 1870 (Detroit: Gale Research Co., 1971). [available in a microform edition]
In addition to formal heraldry, many noble families and individuals through history have adopted informal, personal visual emblems and symbolic phrases and mottoes. Ferdinand "the Catholic" of Spain employed the Gordian Knot cleft with a sword to symbolize his conquest of Moorish Granada and the motto Tanto mounta ("Tantamount") to indicate his assumed equality with his queen, Isabella (a notion which the Castilians never admitted). The book brims with addictive miscellanea and minutiae of history at the personal level. Feuds, jealousy, and ambition from all corners of Europe are represented . . . and more than a few puzzles, such as the unknown symbolism behind the device of "an elephant looking at the moon in adoration."
Parker, James. A Glossary of terms used in heraldry. New edition. Oxford: James Parker & Co., 1894 (repr: Newton Abbot: David & Charles, 1970).
If you don't know the difference between "masculy" and "lozengy," or if you can't envision a "gilly-flower," this is the book for you. Besides the more than 600 pages of alphabetical, often illustrated listings, Parker includes a complete synoptical table of principal terms, logically and systematically arranged. It's also easy to become absorbed in the longer articles on heraldic oddities like the "Collar of SS" and the putative arms of Prester John.
Rothery, Guy Cadogan, Concise encyclopedia of heraldry, Studio Editions, Ltd., repr. 1995
Schweitzer. Frederick M. & Harry E. Wedeck, (eds.), Dictionary of the Renaissance, Philosophical Library, 1967.
Williamson, David, Debrett’s guide to heraldry and regalia, Headline Book Pub., 1992.