"When Unoka died he had taken no title"

A title is a rank and system of hierarchy in the Igbo community that is very highly regarded and difficult to obtain. Only Igbo people who are highly regarded, respectable, and have material goods can obtain titles. Breaking any of the Igbo culture's rules disqualifies a person from getting a title.  

There are rituals a person has to go though before one can obtain his title and generally an insignia is provided to let everyone know what title the person has obtained.