Geoffrey Mosiria is a familiar face to many in Nairobi. As a county official, he is often seen on the front lines of public service, from helping street children to overseeing city health facilities. However, a recent personal discovery has placed the official himself in the spotlight.
The revelation occurred during a sombre occasion. The family had gathered for the burial of Mosiria’s nephew, George Makori. Makori was a respected and well-known police officer.
It was during this family gathering that Mosiria’s 93-year-old father, known as Mosiria Senior, shared a secret that changed the family’s history.
The Bombshell Revelation
For his entire life, Geoffrey Mosiria believed he was the last-born child in a family of 21. He often told people about his 20 siblings, a fact that many found hard to believe. But as he sat with his father, the patriarch corrected him.
"You are 22," the elder Mosiria stated firmly. He explained that the count he had been using was incorrect. There was another child, making the total 22 instead of 21.
“During the burial of my nephew, the famous George Makori, a respected police officer, I learned something that surprised me greatly. For all my life, I believed I was the 21st and last-born child in our family,” Mosiria revealed.

The Family Numbers
The news came as a shock to the Nairobi official. He had always calculated the family as having 12 sons and nine daughters. His father clarified the actual statistics of the household, which was raised by three wives.
According to Mosiria Senior, the family consists of:
- Total children: 22
- Sons: 12
- Daughters: 10
One of Mosiria’s brothers further added to the surprise. He informed Geoffrey that their eldest sister currently lives in the United States. This was a relative Geoffrey had never known existed.
A Storied Patriarch
Mosiria Senior is a man of deep history. At 93, his memory remains sharp regarding his long career and the famous figures he once knew. He spoke of his friendship with the late President Mwai Kibaki. The two were together in Kampala, Uganda, as far back as 1952.
The elder Mosiria also served as a teacher, being the first to teach in Toroboland in the Rift Valley. He later transitioned into a career as a prison officer in 1963.
He worked at various facilities, including Nairobi West and Industrial Area prisons, during the eras of Presidents Jomo Kenyatta and Daniel Arap Moi.

The Search for Number 22
Despite the shock, the family has handled the news with curiosity rather than conflict. Geoffrey has even tasked his eldest brother, Ismael, with finding the 22nd sibling.
The official noted that it is important to identify all family members now. He wants to ensure that when the family gathers in the future, every sibling is recognised and welcomed. For now, the hunt for the missing sister continues, as the 93-year-old father maintains that he will reveal more details at the right time.