Phrase pattern
Who → does what → to whom → ไหม
A yes-or-no question is the same sentence with ไหม at the end
who+does what+whom or what+ไหม
Several rules work together in this pattern: who → does what → what; a question word goes where the answer would be.
Does the husband ask the vendor?
Does Mum send a phone?
Does the son write a book?
Practice with this pattern changes the words each time. They come from the words you're learning.
Kai says
In Thailand, a nickname is often a name people use every day, not just a shortened version of a formal name. It may be chosen before the formal name itself.