No, he is still alive.
As of June 14, 2011, there is no news that Neil Patrick Harris (born in 1973) is dead.
Yes He passed away Jan 10, 1976
Yes, Patricia Roberts Harris died of cancer on March 23, 1985, five months after the death of her husband.
The fictional Betty Boop was never alive outside her animated cartoons . The actress Helen Kane that Betty Boop was fashioned after is dead and passed away September 26, 1966 .