[traderrob6]

Actually it’s uncertain whether “Gilligan” is his first or last name.

Here’s another, Lovey’s maiden name- Eunice Wentworth.

[ETL]

Just don’t try to tell me you knew all these names without having to look them up somewhere. :)

[ZirconEncrustedTweezers]

I think I read somewhere that Gilligan was his last name.

[GreenHornet]

Actually it’s uncertain whether “Gilligan” is his first or last name.

"Gilligan" was his last name. His first name was never given on the series. Sherwood Schwartz once said that, had there been a need for it in one of the scripts, his first name would have been "Willie."