Rihanna is pictured with her uncle Leroy Brathwaite in November.
Tavon Kaiseen Alleyne, 21, was walking through a track near his home in Saint Michael in Barbados on 26 December (17) when he was shot multiple times by a man who subsequently fled the scene.
Williams appeared in the District "A" Magistrates' Court on Wednesday to answer to the charges where Magistrate Douglas Frederick read out the details of the charges without asking for a plea.
Cops have made a breakthrough in their investigation of the shooting of Rihanna's cousin, Tavon Kaiseen Alleyne.
Rihanna's 21-year-old cousin was gunned down and fatally killed in Barbados. They were 23 gun-related murders a year ago.
UPDATE: St Michael man charged with murder of Tavon Alleyne
Alleyne was rushed to the Queen Elizabeth Hospital by a private vehicle and later succumbed to his injuries.
His sister, Tanella, also posted a photo of herself with Alleyne at the hospital, putting an emoji of an angel over his face.
'I never thought the day would come that I would have to bury you my love, omggg!' Tanella wrote.
Rihanna and her cousin Tavon Kaiseen Alleyne in happier times.