In 1951, Wachuku married Rhoda Idu Oona Onumonu (1920-1994).
Jaja and Rhoda had five children, namely: Chinedum Jaja Wachuku, Nwabueze Jaja Wachuku (married to Professor Chuka Nwokolo[REF]); and now Mrs. Nwabueze Nwokolo,[REF] Ndubuisi Jaja Wachuku (married to Ukachi, née Offurum), Emenuwa Jaja Wachuku (married to Ijeoma, née Ekwulugo) and Idu Jaja Wachuku.