Conrad and Barbra Bain

Are Conrad Bain (Maude, Different Strokes)
Barbra Bain (Mission Impossible, Space:1999)

Both are somewhat similar in facial appearance…fair hair, blue eyes…

Or is it just coincidence?

I looked in GOOGLE, but found nothing.

I’d wager “no”.

Conrad Bain was born in Canada, Barbara was born in the U.S. and her birth name was Millicent Fogel. Her bio on the Internet Movie Database is fairly detailed with no mention of Conrad.