All 90 people, including two British passport-holders, who were on a plane which crashed into the sea off Lebanon are feared dead.
Afif Krisht, who had dual British-Lebanese nationality, was one of the passengers, according to sources.
The 55-year-old businessman was a father-of-six who split his time between Lebanon and Plymouth, where three children from his first marriage to a British woman live, according to reports.
Messages paying tribute have been posted on Facebook, with Hassan Krisht, who said his father is Mr Krisht's cousin, writing: "R.I.P all passengers and Amo Afif you will be missed you were like a father."
Mr Krisht and an unnamed British national were on Ethiopian Airlines Flight 409 from Beirut to Addis Ababa when it burst into a "ball of fire" and plunged into the sea off Lebanon just minutes after taking off in stormy weather.
Lebanese authorities quickly ruled out terrorism but it is understood the weather may have played a part in the accident, which happened as thunder, lightning and heavy rain lashed down.
There were 90 people on board the Boeing 737 and more than 30 bodies have been recovered so far.
A Foreign Office spokeswoman said: "We can confirm that one British national and one dual national were on board Ethiopian Air flight number ET 409 departing from Beirut to Ethiopia, that crashed into the sea off the coast of Lebanon.
"A British Royal Air Force helicopter, based in Cyprus, has joined the Lebanese authorities' search and rescue operation.
Ethiopian Airlines said that, as well as the two Britons, there were 22 Ethiopians, 54 Lebanese, one French, one Russian, one Canadian, one Syrian and one Iraqi among the passengers. Also on board was the wife of the French ambassador to Lebanon, according to a French embassy official.