She was stabbed to death at around 10.40am on June 17 while on the Salary Brook trail and her killer is still on the loose.
Scroll down to listen to the family's tribute (in Arabic)
Police officers investigating her death have recently travelled to Saudi Arabia where they met with family.
Speaking on behalf of the family, Dc Jane Morgan, Family Liaison Officer, said: "As a family we have been left devastated by the terrible murder of Nahid. Nahid was a remarkable and gentle person who was loved for her kind and caring nature.
"Publicly Nahid was a quiet and dignified lady who chose to pursue her academic studies in order to work towards her PHD and whilst in England she made a decision that she would respect her heritage and traditions in the way that she dressed and conducted herself.
"However, when she was with her family Nahid was a warm and loving person who enjoyed laughter and the company of her parents, siblings and extended family.
"The amount of people that attended Nahid's funeral is a tribute to how much she was cared for and respected. As a family we have been upset by the media speculation about Nahid's death in particular the publishing of a photograph claiming to be Nahid, which is not her.
"We wish to appeal directly to the person responsible for Nahid's death, to come forward and hand themselves in to the police in order to relieve our suffering and let justice take its course.
"It is vital that anyone with any information about Nahid's death, no matter how small, contacts the police to share the information. We respectfully ask that we are left alone to grieve in private as we continue to work with the police in England and Saudi Arabia to investigate this brutal crime."
Detectives are continuing with their enquiries to trace a number of people who were seen on the Salary Brook Trail between 10.15am and 10.45am on the morning that Nahid was murdered and all descriptions can be seen on the Essex Police website at www.essex.police.uk and via social media sites.Detective Superintendent Steve Worron, of the Kent and Essex Serious Crime Directorate, said: "During the visit, the officers had several meetings with Nahid's family and police officers in Jeddah. These took place over a number of days and during these my officers were able to extend our condolences to her family as well as gaining further information about Nahid's life in Saudi Arabia before she left to further her studies in England."
He added: "This visit was an important step in engaging with Nahid's family as well as developing links with local police who are keen to assist with the investigation.
Please have a look at the appeals, share them with your friends and colleagues.
Any information you have no matter how small could help us so please get in touch via the incident room on 01245 282103 or anonymously via independent charity Crimestoppers on 0800 555 111.
Crimestoppers have offered a reward of £10,000 payable for information which leads to the conviction of the person or people responsible for Nahid's murder.
