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Rigathi Gachagua is Moi’s biological son

Rigathi Gachagua is Moi’s biological son

By John Kamau, Editor, (

United Democratic Alliance (UDA) presidential running mate, Mathira MP Rigathi Gachagua, is former President Daniel arap Moi’s biological son, can authoritatively report.

Gachagua, who was born in 1965 in Ruguru village, Mathira Constituency, Nyeri County, being the eighth born child to Nashashon Gachagua Reriani and Martha Kirigo, reports say his mother, Martha Kirigo used to be Moi’s grassroots mobiliser and the two had a relation that resulted in his birth.

A photo taken around 1968 where Moi is with his all children has Gachugua at the far left.

This means that UDA has presented two Kalenjins for the top seat – Deputy President William Ruto (Kipsigis) and Gachagua (Tugen).

Interestingly, for Ruto his biological father is not Mzee Daniel Cheruiyot, who died recently, but a Kipsigis man who was a chief.

Reports say Ruto’s mother, Mama Serah Cheruiyot had a relation with the Kipsigis chief resulting in the birth of the Deputy President.  

That aside, Gachagua was brought up by Nashashon Gachagua Reriani and Martha who were Mau Mau freedom fighters in Mt Kenya forest.

Reriani was building and servicing guns for the freedom fighters. 

Gachagua enrolled at Kabiruini Primary School from 1971 to 1977 before proceeding to Kianyaga High School for his O-levels and A-levels.

 In 1985, he joined the University of Nairobi where he graduated with a Bachelor of Arts Degree; Political Science and Literature in 1988.

At the University, Gachagua was known to speak directly to Moi, his father, who even bought him a car as a gift.

Moi also directed then spymaster, James Kanyotu, to be funding Gachagua to spy on other students.

According to former ODM Political Affairs Director and one-time SONU leader, Wafula Buke, Gachagua has been a member of the deep state since his campus days.

Buke says Comrades (UoN students) feared Gachagua so much that while conversing and he approached them, the students lowered their voices for fear of being arrested by security agents and charged with subversion. 

"He was the only confessed student I knew who talked to Moi directly and bragged about it," added Buke. 

After graduation, from 1990 to 1999, Gachagua worked in various capacities in the ruling party, KANU administration, including serving as personal assistant to the Head of Public Service, Prof. Phillip Mbithi  and as District Officer in different parts of the country. 

During the clamour for the second liberation, the Gachaguas (Rigathi and his late brother Nderitu) aligned themselves to the KANU regime with Rigathi joining the infamous YK92 group. Ruto was the secretary general of YK92 

 Gachagua served as a District Officer in Kakamega, Ng'arua and Laikipia Districts.

Between 1999 and 2000, he joined Kenya School of Government where he graduated with a Diploma in Advanced Public Administration.

On the 15th of May 2022, he was nominated as the presidential election's running mate for under Kenya Kwanza political coalition.

Ruto picked him though Tharaka Nithi Senator Kithure Kindiki was the favourite. 

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