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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|
| Yeatman | 1 | Yonge | 1 | Yaroslavna | 1 | Ynyr | 5 | Youngs (Yonges), Jr. | 1 |
| Yoakley | 2 | Yate | 1 | Yaroslavna, Princess of Kiev | 1 | Ynyr "Fychan" | 1 | Youngs, Jr. | 1 |
| Yoakley, Sr. | 1 | Yeoman | 1 | Yngvasson | 3 | Yorstone | 1 | Yeager | 1 |
| Yoakley, Jr. | 1 | Yeovilton (Jenelton) | 1 | Yngvasdotter | 1 | Yates | 2 | Younglove | 1 |
| Yebe | 1 | Yaroslavna, Queen of France | 1 | Yaroslavich (Grand, Duke of Kiev) | 1 | York & Dublin | 1 | - | - |
| Youngs | 32 | Yarolsavich, Duke of Novgorod | 1 | Yelverton | 3 | Young (Youngs), Jr. | 1 | - | - |
| Young | 20 | Yaroslavich | 3 | Ystrwyth | 2 | Young (Youngs), Sr. | 2 | - | - |
| York | 1 | Yaroslavovic | 1 | Ysbwys "y Garthen" | 2 | Young (Youngs) | 1 | - | - |
