Gideon Cahill's father is Gideon Cahill and Gideon Cahill's brother's father. He lived in Milan, Ireland and was a true genius.
Mr. Cahill's Globe
Mr. Cahill had a bronze astronomical globe. When he was in Italy, he sent it to his son Gideon Cahill's family. Later, in 1507, after Mr. Cahill died, Katherine Cahill, Gideon's daughter, was disassembling pieces of the globe. This globe might have even be an armillary sphere.