Mr Osman was a well-respected elder statesman
He was also the first African leader to voluntarily relinquish his post after he lost the 1967 presidential election - Somalia's last democratic poll.
Siad Barre seized power two years later and since he was ousted in 1991 rival warlords have fought for control.
Mr Osman was a well-respected leader and emerged as an elder statesman in attempts to establish lasting peace.
His family says he was very unhappy with the current crisis and his dream was to see Somalia attain peace and stability.
Mr Osman rose to prominence as a nationalist politician in the 1950s.
He was elected head of state when the former British and Italian Somali colonies joined to form the Republic of Somalia in 1960.
Some Somali leaders have remembered him as a simple, down-to-earth person.
, the first President of Somalia died last week from natural causes in a Nairobi hospital. He was 99.

Born in 1908 in Beledweyne, Hiiraan region in the , Osman was elected as the first President of Somalia in 1960 and served till 1967, when he was he was defeated by .

He spent his later years in Janale in southern Somalia and in May 2007 it was erroneously reported that he died in a hospital in Nairobi, Kenya. It was later clarified, however, that he was on life support, in critical condition, but had not yet died.

The  declared 21 days of mourning and said that he would receive a state funeral. It also voted to rename  after him.

Osman is survived by eight children.