Family members of American citizen Philip Wood, a 50-year-old IBM executive who was on board the missing Malaysia Airlines jet, said they saw him a week ago when he visited them in Texas after relocating to Kuala Lumpur from Beijing, where he had worked for two years.
"He is outgoing, gregarious, friendly, loving", said his brother James Wood, adding that his brother loved to travel and that the family would "get emails about him being all over the place."
His other brother, Tom, said he was not giving up hope of finding him.
"I'm not going to close that door until we need to close it completely."
A steady stream of friends and family are visiting and offering support to the Wood's family.
Many brought baskets of food.
Philip Wood is one of three Americans on board the missing Boeing-777 plane which was carrying 227 passengers and 12 crew members when it disappeared on Saturday morning.
He is divorced with two grown-up sons.
One attends Texas University and that another is an alumnus of that university.
The other two Americans were identified on the passenger manifest as 4-year-old Nicole Meng and 2-year-old Yan Zhang.
It was not known with whom they were travelling with.
More than two days after Malaysia Airlines Flight MH370 went missing, the final minutes before its disappearance still remain a mystery.
The plane on its way from Kuala Lumpur to Beijing lost contact with ground controllers somewhere between Malaysia and Vietnam