a certain
Un tal Sr Brown vino para verte cuando estabas fuera.
A Mr. Brown came to see you when you were out.
Aquí hay una nota de un tal Borís.
Here is a note from someone named Boris.
— Cuando pasan las cigüeñas (1957)
Hay un tal Sr. Kay que quiere ver te.
There's a Mr. Kay who wants to see you.
Un tal Bardolph, si lo conoce Vuestra Majestad.
A certain Bardolph, if Your Majesty knows him.
— Enrique V (1989)