The Ties That Bind In The Open Water

What do these individuals have in common?
Captain Matthew Webb, George Young, Keo Nakama (shown on left), Mercedes Gleitze, Barry Devonport, Tom Blower, and David Yudovin.
Hint: The Oceans Seven.
These were the first individuals who crossed each of the channels in the Oceans Seven (English Channel in 1875, Catalina Channel in 1927, Molokai Channel in 1961, North Channel in 1947, Strait of Gibraltar in 1928, Cook Strait in 1962, Tsugaru Channel in 1989).
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