Jet may have broken apart before Florida crash, officials say, as family named among victims

The Texas tech entrepreneur, his wife Helen Sharp and their two children, Emma, 4, and Charlie, 2, were all killed in the crash, according to a joint statement from some of the families of those killed.

Their family described them as "devoted parents" and said their children were "the light of their lives".

"Helen and Adam were the love affair that will last forever. Their warmth, generosity and gift for making people feel welcome touched so many lives," the statement reads.

On his LinkedIn page, Robinson described himself as the founder and CEO of RB2B and Retention.com, and the CEO of Moltsets.

He previously worked at global financial services business Lehman Brothers and the banking group Barclays.

The BBC has contacted the companies for a statement.

Fellow tech entrepreneur Jesse Ouellette posted on LinkedIn about Robinson's death, saying he had helped him when he was building his company.

"He became a friend and someone I saw eye to eye with on how to build software companies," wrote Ouellette.

"He could disagree with you about almost anything, and somehow you'd walk away liking him even more."