Mother Western is the fourth earliest mare in the lineage of the maternal line of the family descending from Foundation Mare Brimmer Mare

Dam of Sister to Young Rib, through which the trunk of the family continues; and of Spiletta (by Easby Snake) through which the maternal line of the family continues, subsequently evolving into branch 12-g of the family

Dam of Champion (1745 King's Plate York); and of Spiletta, dam of the peerless Eclipse, the greatest racehorse of the 18th century, unbeaten winner of 18 races including 12 King's Plates, second in the list of leading sires 11 times, every year from 1778 and 1788, and progenitor of the Darley Arabian male line from which over 95% of the world's current thoroughbreds descend