GCFR · Grand Commander of the Federal RepublicHead of State, 1976–79 · President, 1999–2007· Conferred 1999-05-29
Olusegun Obasanjo
Twice Head of State. By convention conferred the GCFR upon civilian inauguration in 1999.
The record
General Olusegun Obasanjo (b. 1937) was Military Head of State from 13 February 1976 (on the assassination of Murtala Muhammed) until 1 October 1979, when he handed over to the elected Shehu Shagari — the first military-to-civilian transition in Nigerian history. He returned to power as elected President from 29 May 1999 to 29 May 2007, the first President of the Fourth Republic.
Tier 1 · primary
Courts. Gazettes. National archives.
Tier 2 · corroborating
OCCRP. HRW. BudgIT. TheCable.
Tier 4 · tertiary, flagged
Wikipedia only where primary is pending. Always labelled.