William De Lancaster
Abt 1100 - 1170 (70 years)(
= Descendancy chart to this point, 
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- 1 William De Lancaster [1] b. Abt 1100 d. 1170
- Gundred De Warenne b. Abt 1119 d. Abt 1166
- 2 Avice De Lancaster [1.1] b. Abt 1130 d. 1 Jan 1191
- Richard De Morville b. Abt 1127 d. 1189
- 3 Helena De Morville [1.1.1] b. Abt 1153 d. 11 Jun 1217
- Lord Roland Galloway b. Abt 1135 d. 19 Dec 1200
- 4 Lord Alan Of Galloway [1.1.1.1] b. 1186 d. 1234
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- 4 Devorguilla Of Galloway [1.1.1.2]
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- 4 Lord Alan Of Galloway [1.1.1.1]
- 3 Helena De Morville [1.1.1]
- 2 Avice De Lancaster [1.1]
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- 2 William II De Lancaster [1.2] b. Abt 1154 d. 1184
- Helwise De Stuteville b. Abt 1155 d. Aft 1228
- 3 Hawise De Lancaster [1.2.1] b. Abt 1172 d. Aft Sep 1226
- Gilbert Fitzreinfrid b. Aft 1157 d. Bef 13 Jun 1220
- 4 William De Lancaster [1.2.1.1] b. Abt 1189 d. Yes, date unknown
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- 4 William De Lancaster [1.2.1.1]
- 3 Hawise De Lancaster [1.2.1]
- 2 Avice De Lancaster [1.3] b. Abt 1130 d. 1 Jan 1191
- Richard De Morville b. Abt 1127 d. 1189
- 3 Helena De Morville [1.3.1] b. Abt 1153 d. 11 Jun 1217
- Lord Roland Galloway b. Abt 1135 d. 19 Dec 1200
- 4 Lord Alan Of Galloway [1.3.1.1] b. 1186 d. 1234
[ =>]
- 4 Devorguilla Of Galloway [1.3.1.2]
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- 4 Lord Alan Of Galloway [1.3.1.1]
- 3 Helena De Morville [1.3.1]
- 2 William II De Lancaster [1.2]