No they are not
Nope
Nope, they're not related at all. Yolanda Adams and Oleta Adams just happen to share a last name and both have powerhouse voices, but that's where the family tree ends. It's like asking if Beyoncé is related to Barack Obama just because they both have the same initial.
Oleta Adams's birth name is Oleta Angela Adams.
Oleta Adams is married to percussionist John Cushon
Oleta Adams was born on May 4, 1953.
The Very Best of Oleta Adams was created in 1996.
Evolution - Oleta Adams album - was created on 1993-07-26.
Moving On - Oleta Adams album - was created on 1995-10-23.
Oleta
oleta Adams
She is petite - about 5'3".
When the name Oleta Adams is heard many people think of her work done in the Jazz genre of music. Oleta was a great musician and won the R&B single award in 1994.