Here is a link to a very nice story about the family members of the Badfinger guys who played with George on stage at the Concert For Bangla Desh.
I will not copy all of it but please have a look, it is very interesting to read I think.
Here is a bit of the opening, so you have an idea
"At the Steven J. Ross Theater on the Warner Bros. Studios lot, a long overdue occurence presented itself - the first meeting ever with all of the children of Badfinger's Pete Ham, Tom Evans, and Mike Gibbins together. Arriving as guests of Apple Corps., Olivia Harrison, and UNICEF were Petera Ham (daughter of Pete Ham and Anne Herriot), Stephen Evans (son of Tom Evans and Marianne Evans), Owen Gibbins (son of Mike Gibbins and Gaynor Gibbins) and David & Adam Gibbins (the two sons of Mike Gibbins and Ellie Gibbins). What made this reunion especially poignant for those who witnessed it was the knowledge of the very recent passing of Mike Gibbins. Ellie, Mike's wife, had said he had been so looking forward to this night. Undoubtedly, Mike would have been proud to see his family represent him so well. Ellie had brought her boys and Owen. She spoke of the importance of them further grasping the significant contributions their father had made to this historic event."
"At one point further into the night, Olivia Harrison, made her way near our area. She was approached by some of our group. She was very kind and complimentary to everyone and spent some special time alone with Ellie Gibbins, consoling her about Mike. Neil Aspinall and Jonathan Clyde, executives at Apple Corps., were also very gracious. Mr. Clyde was particularly attentive and that was much appreciated by the younger set."
There are pictures at the underligned lines.