“For the early Irish Lent began the Sunday after Ash Wednesday. Gilbert of Limerick (†1145) insisted on Ash Wednesday” 1. This injunction was part of the programme of church reform that took place in the 12th century, reform that Gilbert (or Gille) of Limerick was deeply involved with. Gille was also “a philosopher whose philosophical thinking form[ed] the basis of his canon law” 2.
We know very little about Gille’s life: there are even numerous versions given of his name. He refers to himself both as Gille and Gillebertus 3. It is not even clear whether he was of Irish or Norse extraction. John Fleming suggests that his family roots are almost certainly in the Hibero-Norse city of Limerick 4, but his choice to retire to Bangor, Co. Down where he died may suggest that as his birthplace 5