The only bantus who circumcize in kenya learnt it from Kalenjin and the aboriginal Okiek. Ugandans bantu don't circumsize. Luhyas borrowed Kalenjin circumscion and age-set almost word for word. Kikuyus and Merus the same.
That is why you have common names like Maina, Juma (chumo), Mwangi/Nyongi ,Nyige, Irungu( corrupted of korongoro) etc - in luhyas, gusii, kikuyus - and kalenjin. These are kalenjin ageset names..Maina, Nyongi, Sawe, Chumo, etc
Those are kalenjin ageset names - corrupted to sound bantu.
1. Bakolongolo: 1900-1910 and also 2000-2010
2. Bakikwameti: 1912-1922 and also 2012-2022
3. Bakananachi: 1924-1934
4. Bakinyikeu: 1936-1946
5. Banyange: 1948-1958
6. Bamaina: 1960-1970
7. Bachuma: 1972-1986
8. Basawa: 1988-1998
Kalenjin circumscion is very old - learnt from ancient egypt times. Kalenjin were north most nilotes - and move to Ethiopia then Kenya with Somalis/Oromos - from Cush Kingdom in present day Sudan.
Why do you like distorting history and making up fairly tales. The only Luhyas who do not circumcise are the Samia who have very close relations with the Luo.
Circumcision is more a Bantu thing than Nilotic to which the Kalejin belong to. So most likely the Kalejin adopted male circumcision much later than the other groups. Also other groups of Luhyas who have no close ties to the Kalejin practice circumcision like the Maragoli or Kisa.
Also do not confuse the Tirki with the Terik. The Tiriki are Luhyas neighbouring the Nandi. Terik are Kalejin who live in Luhya territory. A good example of Terik is Sally Kosgei who grew up in Luhyaland and speaks both Luhya and Kalejin.