They belonged to a stateless group of people denied citizenship and other rights by Kuwait called the Bedoon.
The Mirror visited an area of Kuwait called Jahrah where many of the people are extremely living in cramped conditions inside tumbledown shacks on dusty streets.
Inside one mosque in Jahrah, a man claimed to remember the Emwazi family, saying Mohammed’s parents Jasem, 51, and Ghaneya, 47, got married in 1987, the year before their Islamic State executioner son was born.
He said: “I believe they married in 1987. They had a ceremony inside a large tent that was set up for family and friends to attend.
"They were a nice family. They moved away some time ago, away from Kuwait.“Many of the people here will leave to go to Canada, or the UK.
“I think I saw Jasem around two years ago walking down the street.I spoke to him and he seemed to be doing well.
“I don’t know anything about their son turning to ISIS. I never saw him and don’t know anything about him.
"This would be a great shame. His father was a good person.”
The family left Kuwait and travelled in 1993 to live in Britain shortly after the invasion of the country by Saddam during the Persian Gulf War.
Mohammed returned to Kuwait in 2009, finding work with a computer firm and becoming engaged to a local woman.
The UK authorities blocked him from going back to the Middle East the following year after suspecting him of radical activities.
Elijah Magnier, chief international correspondent for Kuwait’s Al-Rai media group, said: “When the British asked the Kuwaitis to deny Emwazi access to the country in 2010 the security services here looked into his background.
"They found his family are Bedoon, of Iraqi origin. The Bedoon are looked down upon by some people and almost treated like an underclass.
He added: “Mohammed Emwazi may not have known it, but by fighting in Iraq, he is returning to his roots.”
There are estimated to be more than 100,000 Bedoon living in Kuwait, but they are considered illegal residents by the government.The term describes people who were denied citizenship after the Gulf State declared independence from Britain in 1961.Bedoon complain that they suffer discrimination and are denied full access to education, work and healthcare in Kuwait.
ISIS butcher Jihadi John was given anger therapy at school
Barbaric Mohammed Emwazi received anger management therapy at school after getting into fights, it has emerged.
Emwazi, the ISIS butcher known as Jihadi John, was desribed by a teacher as a "success story" for appearing to overcome his anger problem to achieve good grades.
An official statement from the school in north-west London, released by Westminster Council yesterday, said it was "shocked and sickened" that the former pupil was involved in terrorism.
"If the allegations are true we are all extremely shocked and sickened by the news.