Within the UK and Ireland, the surname Gillespie most frequently occurs in Ireland where it is carried by 1 in every 1,064 people. The majority of those with the family name of Gillespie are to be found living in/around Ulster (approx. 20% of all UK Gillespie's), Leinster and Connaught. The name can also be found in Scotland with 1 in 1,126 people using it, and England with 1 in 7,549.
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