Ernest Kalawa, 24, was stabbed to death in Peckham on 30 December 2016.
Police and paramedics were called to an area outside Deerhurst House in Haymerle Road at around 5.30pm.
Mr Kalawa, who was also known as Alex and lived in Southwark, was pronounced dead at the scene and a post-mortem gave cause of death as multiple stab wounds.
On 14 February 2017 Klark Mangal, 21 (12.03.95), of Peckham, was charged with murder. The following day Derron Campbell, 23 (13.04.93), of Southwark, was charged with murder.
They are both due to stand trial at the Old Bailey on 3 July 2017.
Ernest's family said in a statement: "Ernest's tragic death is a massive loss to the family. Everyone is in shock and struggling to come to terms with the loss of our son, brother, cousin, and friend. At the moment the pain is still very fresh.
"Our family only really want time and space to grieve in private, and ask that the press and media respect our wishes. Ernest was loved and cherished and we all miss him deeply."
Anyone who witnessed the assault, or moments leading up to it, is asked to contact the incident room on 020 8721 4205 or via 101. To give information anonymously contact Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.