You would say "¿Dónde está mi gato, señor?"
gracias señor
Reverendo Señor
Gracias, senor (tilde, ~, on the 'n')
¿Que paso, senor?
Sí, señor. ¿A qué hora?
"Ese es un burro bonito, senor" that's how you say it
Entiendo, señor
Señor, le doy la más cordial bienvenida.
La señora O'Leary, it's pronounced, according to the IPA for Spanish: [la. se.'ɲo.ɾa o̯. le̯a.'ɾi]
Senor in Spanish means sir.
You say, "Buen señor, ¿Dónde está mí dinero?" Spanish requires that you put someone up on a pedestal before you snatch it out from under them. That's why the Buen señor goes first.
Names, especially sir-names, are not translated unless the owner of that name uses a translation.