Why Corcoran?

I think this is a minor quibble in an extremely well-made comedy from the 1970's.

I know what you're saying but I think you're splitting hairs here! I actually buy Eddie Albert as an established conservative Irish Minnesotan w/his trademark breaking-point intolerence, he's great! Maybe a 'Corcoran' married Germanic & actress Audrea Lindley (English roots I think) passes for me! Assuming you're of the States like me, aren't we all a country of blender-American mutts anyway?

If you've been around long enough, America's been used to Green Acres on TV w/Eddie's character played straight foil opposite his kooky wife played by Eva Gabor (Hungarian-Am).

Actually the shiksa types in these movies tend to be blonde Irish Catholic. It all started with Abie's Irish Rose through the 70's with the sit-com Bridget Loves Bernie, then the 80's Over the Brooklyn Bridge with Elliot Gould and Margeaux Hemingway as his Blonde Irish princess from Philadelphia. It was not as all comforting to the families that these women were Irish Catholic. It just seems that these two types are attracted to eachother more often I assume. I know so many Jewish/Irish couples.

It seems only after all the movies made about the Holocaust the idea to make the ideal blonde shiksa Scandinavian. Perhaps to make it a little kinkier. You know like a Jew worshipping Hitler's ideal and all.

I see no beauty here, nor fit for breeding.

I think it's simply a name that connotes a WASP-y well-established financially successful family. Most people would not associate it with Irish specifically.

Kind of a random detail to focus on though.

Agree with the OP. In fact that same thought had crossed my mind. A name like Bergman, Magnuson, or something would have been more plausible. But then, she kind of looked like a "Kelly Corcoran."