Detectives want to question Mohamed Sharifahmed, 23, who is also known as Mohammed Shariff, and is known to stay at addresses in the north London area.
So far, officers have been unable to locate Sharifahmed but they hope that by naming him and releasing his picture, members of the public will come forward with information about his whereabouts.
Bedfordshire and Hertfordshire’s Major Crime Unit is leading the investigation into the incident which happened in Dumfries Street on January 31 and are still keen to speak to anyone who has information.
The incident happened at around 7.50pm when the victims were at home where they live together with their respective wives and a young child.
Three masked men knocked on the door and as it was opened the offenders forced their way into the property before carrying out a violent assault on the younger man, inflicting multiple stab wounds, as well as stabbing the older man. No one else in the house was injured.
Both victims have been released from hospital and are recovering from their ordeal.
One man from London has already been charged with Section 18 GBH (wounding with intent), Section 20 GBH (wounding), Aggravated Burglary and False Imprisonment.
Anyone with information should call the Operation Harvester Incident Room in confidence, on 01707 355959 the non emergency number 101, or text information to 07786 200011.
Alternatively contact independent charity Crimestoppers, anonymously, on 0800 555 111, or online at www.crimestoppers-uk.org
