Translation:¿Sabes quién es aquel hombre?
Aquel vs eso? Why not eso here? Eso hombre=that man?
Wouldn't you use 'conoces' here intead of 'sabes'?
Do you know that man? would be ¿Conoces a ese hombre? but here the speaker is asking if you know the man's identity. You might say, "Yes, he's the President of France" (so you know (saber) who he is) but you've never actually met him (conocer).
Thanks. That makes sense.