Isabella of Castile, Duchess consort of York - My tree

@Isabella of Castile, Duchess consort of York is my 5th cousin 18 times removed Judy Rice

Donald, she is also my 17th Great-Grandmother. All I can think of is check to see that a key person that connects her to your tree isn't missing. Mary

Isabella of Castile, Duchess consort of York is your fourth cousin 20 times removed.
You
→ Linda Sue Cox
your mother → Gladys Mae Lockwood Tyler (Kelley)
her mother → Vivian Lucille Kelley/Payne/Smith (Cromer)
her mother → Floyd Francis Cromer
her father → Elizabeth Ann Cromer (Grosvenor)
his mother → Araminta Margaret Grosvenor (Whitney) Houser
her mother → Francis Tufts Whitney
her father → Joseph Whitney
his father → Benjamin Whitney
his father → John Whitney
his father → Benjamin Whitney
his father → Elinor (Ellen) Whitney
his mother → Thomas Bray
her father → Sir John Bray
his father → Beatrice Bray (Shirley)
his mother → Sir Richard Sherley of Wiston
her father → Ralph Shirley of Staunton Harold
his father → Elizabeth Blount
his mother → Sir Thomas Blount, Kt.
her father → Sancha Blount, Lady de Ayala
his mother → D. Inés Alfonso de Ayala, señora de Malpica
her mother → D. Elvira Álvarez de Ceballos, señora de Escalante
her mother → Diego Gutiérrez de Ceballos
her father → Ruy / Rodrigo González de Cevallos
his father → Teresa González de Cevallos y Hoz
his sister → Fernán González de Henestrosa, VII
her son → María Fernández de Henestrosa
his daughter → María de Padilla
her daughter → Isabella of Castile, Duchess consort of York
her daughter

;-)

Isabella of Castile, Duchess consort of York is my 20th great grandmother.

Isabella of Castile, Duchess consort of York is your 19th great grandmother. Donald, it could be a condensing of your tree. Make sure everyone related to you is shown. Othere than that, not sure I am of help.

Isabella of Castile is also my 17th great grandmother.

Second Path:

Isabella of Castile, Duchess consort of York is your 22nd great grandmother.

You → Linda Sue Cox your mother → Gladys Mae Lockwood Tyler (Kelley) her mother → Vivian Lucille Kelley/Payne/alias- Smith (Cromer) her mother → Floyd Francis Cromer her father → William Harrison Cromer his father → Harrison "Abe" Cromer his father → Sarah Jane Cromer (Covalt) his mother → Timothy Isaac Covalt her father → Abraham Covalt, Jr. his father → Abraham Colt, III his father → Abraham Colt his father → Hannah Colt (Loomis) his mother → Joseph Loomis, II her father → Joseph Loomis, I his father → Agnes Loomis (Lingwood) his mother → John Lingwood, of Braintree her father → Mary Lingwood (Wilson) his mother → Susan Wilson (Josselyn) her mother → Anne or Anna Josselyn (Brooke)her mother → John Brooke, 7th Baron Of Cobham her father → Elizabeth Brooke (Touchet), Baroness of Cobham his mother → Eleanor Tuchet (de Holland), Baroness Audley her mother → Constance of York, Countess of Gloucester her mother → Isabella of Castile, Duchess consort of York her mother