Joan of Lancaster, Baroness de Mowbray - Joan of Lancaster, Baroness de Mowbray is your 19th great grandmother.

Joan of Lancaster, Baroness de Mowbray is your 9th cousin 12 times removed.
You → Elza Dzelvite (Grahpe,Grāpe) (your mother) → Jahn Grahpe (her father) → Baron Arnold Julius von Vietinghoff-Riesch (his father) → Juliane Charlotte Lulla von Vietinghoff (his mother) → Helene Gertrude von Krüdener (her mother) → Gustav Georg von Völckersahm (her father) → Sophia Elisabeth von Mengden (his mother) → Freiherr Magnus Gustav von Mengden, auf Altenwoga (her father) → Freiherr Gustav von Mengden, auf Altenwoda (his father) → Gertrud von Mengden Frfr. von Altenwoga (his mother) → Jürgen von Rosen (her father) → Kersten von Rosen (his father) → Kersten III von Rosen auf Hochenrosen (his father) → Jürgen l von Rosen (his father) → Henneke von Tiesenhausen (his mother) → Bartholomeus von Tiesenhausen, of Kokenhausen (her father) → Johann von Tiesenhausen (his father) → Hans von Tiesenhausen (his father) → Hildegunde Buxhöveden (his mother) → Albert von Buxhoeveden, I (her father) → Gudela von Stade (his mother) → Richardis von Sponheim (her mother) → Engelbert von Schwarzenberg-Sponheim (her son) → Margaretha von Schwarzenberg (his daughter) → Matilda of Saffenberg (her daughter) → Margaretha de Brabant (her daughter) → Henry I, duke of Brabant (her son) → Henry II, duke of Brabant (his son) → Mathilde van Brabant (his daughter) → Blanche of Artois (her daughter) → Henry Plantagenet, 3rd Earl of Leicester and Lancaster (her son) → Joan of Lancaster, Baroness de Mowbray (his daughter)

Joan of Lancaster, Baroness de Mowbray
is my third cousin 20 times removed.