Which is the oldest Wayans brother? Keenan Ivory, or Damon?

Keenan,damon,shawn,marlon in that order

Keenan Ivory, b. 8 June 1958
Damon b. 4 September 1960

You could have found this answer buy typing in the name in http://imdb.com as well, It places the birthdate next to the name

There is also a brother named Dwayne, all brothers are actors. He has four sisters as well.

The Duke, John Wayans.

AC you gerfot Wayan Newton, not to mention way-in and way-out.

That’s Wayans Newton, to you.
Danke Schoen.

there is five sisters and five brothers in the family…. the order is Keenan Ivory, Damon, Kim, Shawn, Marlon, Elvira, Nadia, Diedre, Vonnie and Dwayne… presumably Dwyane died in 2000 but others say he was born in 1957 and is stil alive which makes him the oldest but isn’t in Show biz