I need to know the name and date for the first person to swim the
English Channel both ways.

Dear wordkraft,

The first person to swim the English Channel both ways was Edward
Harry Temme. He swam from France to England on 5 August 1927 (14 h, 29
min), and from England to France on 18 August 1934 (15 h, 34 min).

The first person to swim the English Channel both ways non-stop was
Antonio Abertondo. He swam from England to France and back in with
only a 4-minute break in 43 hours and 10 minutes on 20/21 September
1961.


Sources:

Dover Museum: Online Exhibition - Swimming the Channel
http://www.dover.gov.uk/museum/resource/swim/swim1.asp

Soloswims.com: Listing of Successful Swims - Multiple Solo Crossings
http://soloswims.com/CSA-Solo-Multiple.htm

Channel Swimming: Swim Lists
http://www.channelswimming.com/swim-list.htm


Search terms used:
"first man" swim "both ways" "english channel"
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"Ted Temme"
://www.google.de/search?hl=de&q=%22Ted+Temme%22&btnG=Google-Suche&meta=
temme "english channel"
://www.google.de/search?hl=de&q=temme+%22english+channel%22&btnG=Google-Suche&meta=
"edward harry temme"
://www.google.de/search?hl=de&q=%22edward+harry+temme%22&btnG=Google-Suche&meta=
"Antonio Abertondo" 1961 september
://www.google.de/search?hl=de&newwindow=1&c2coff=1&q=%22Antonio+Abertondo%22+1961+september&spell=1
"Antonio Abertondo" 1961
://www.google.de/search?hl=de&newwindow=1&c2coff=1&q=%22Antonio+Abertondo%22+1961+hours&btnG=Suche&meta=


Hope this answers your question!
Regards,
Scriptor