"Cad é a sheoladh?"

Translation: What is his address?

[Bredacm]

I don't understand this. When I answer 'His" they say "her" and when I say "her" they say "his" what is the difference?

[SatharnPHL]

a sheoladh (with a séimhiú) "his address"
a seoladh (no séimhiú) "her address"

[updown2021]

Why is this aspirated? Does it ever make sense to say "Cad é a seoladh?"

[galaxyrocker]

Cad é a seoladh does make sense and would mean either 'what is her address' or 'what is their address'. The aspiration here marks a as meaning 'his'