Actually he was born in Uasin Gishu
Ruto was born in Cheptiret, Uasin Gishu county in 1967. He only came to Sigor when he wanted to contest for election in 1997, his nickname was Cheptiret and he figured the Nandis would not like that.
I guess that subtext of his attempt to drive Nandi-Kispigis wedge