fitzgerald/fitzgerald is the 692nd most frequent surname in the united kingdom. the surname occurs most frequently in the following ten counties, in descending order, with the number of occurrences in parentheses: "1. greater london, (500), greater manchester (191), west midlands (176), lancashire (130), kent (118), essex (117), west yorkshire (113), merseyside (108), hampshire (84), and surrey (76)."