There isn't one. It's an Irish name. The only names that would have translations across languages are Biblical names. Though 'Smith' in English translates as 'Schmidt' in German.
It's probably the same, but pronounced differently. For example, the singer Sheena Easton I heard referred to on Spanish radio as: Shay--AY-nah AY-ahs-tonn.
By which light 'Keenan' would (incorrectly, of course) pronounced kay-ay-NAN.
To get the approximate sound of the English pronunciation of the name, you write it 'kinan' in Spanish, with an acute accent over the 'i'.
BRIGIDA
Conrado is a Spanish version of Conrad, but might not be the only one.
Antonia is used as a Spanish name. It is derived from the Latin Antonius family and is the female version of Antonio. The name means "priceless" and "beautiful".
Maria is basically just a name. It could also be the Spanish version of the name "Mary""My good friend's name is María""Mi santo preferido es Santa María"
Catalina or Katalina is the Spanish version of the name Catherine or Katharine, which means "pure" in Greek.
The Surname Keenan orginates from Ireland. This is the anglicised version of the Gaelic MacFhionnain meaning "son of fhionnain" from "Fionn" meaning fair. The Motto for Keenan is "Trusting in God Perserve".
Keenan Henson's birth name is Keenan Lee Henson.
Keenan McCardell's birth name is Keenan Wayne Mccardell.
Keenan Browder's birth name is Keenan David Singleton Browder.
Ted Keenan's birth name is Edward C. Keenan Jr..
Keenan Wynn's birth name is Francis Xavier Aloysius James Jeremiah Keenan Wynn.
the birth name of Maynard James Keenan is James Herbert Keenan. He adopted the name Maynard on a whim while serving in the army.
Yes because my surname is keenan and I am Irish
BRIGIDA
Sterling James Keenan's birth name is Matt Polinsky.
Conrado is a Spanish version of Conrad, but might not be the only one.
Roberto is the Spanish version of Robert.