The death of the 71-year-old was announced by his son, Dillibe Jnr. on his Facebook page on Friday.
Sharing pictures of the deceased, the grieving son stated that he had learnt a lot from his father’s life.
He wrote, “Even though we were far apart, I have never stopped loving you; never stopped thinking about you.
“I’ve learned a lot from your life, your love, and your motivational words. Until we meet in the resurrection morning sweet daddy.
“Go with God. This isn’t goodbye.”
The older Onyeama was famous for his controversial novel, “Nigger at Eton”, where he detailed the racial discrimination he faced at the Eton College.
Onyeama was the first black boy to be admitted to the British school in the 60s.
His memoir of his experience at the school led to his expulsion by the then-headmaster, Michael McCrum.
In 2020, the school’s present headmaster, Simon Henderson, apologised to Onyeama for the treatment he had received as a student back in the 60s.
The book was later revised as “A Black Boy at Eton” in 2022.
Onyeama got a diploma from the Premier School of Journalism, and established the Enugu-based publishing company, Delta Publications, after he returned to Nigeria in 1981.