6 dated entries naming Earl of Chester, drawn from 6 separate years between 1094 CE and 1504 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.
1094Richard d'Avranches, 2nd Earl of Chester (d. 1120)source
12th century
1120November 25 – Richard d'Avranches, 2nd Earl of Chester (b. 1094)source
1129January 27 – Ranulf le Meschin, 3rd Earl of Chester (b. 1070)source
1147Hugh de Kevilioc, 5th Earl of Chester (d. 1181)source
13th century
1223October 8 – At Montgomery in Wales, King Henry III of England reaches a peaceful settlement with Llywelyn ab Iorwerth, the powerful ruler of the semi-independent Principality of Gwynedd, following a mediation by Ranulf de Blondeville, the Earl of Chester.source
16th century
1504February 18 – The investiture of Prince Henry of England as Prince of Wales and Earl of Chester takes place.source