Why are Thai names so strange?

Is a person who translates his name into Chinese. No, this translation is transliteration, which sounds strange and casual.

For example:

(1) Thaksin

Thai:? [Pronunciation: tak1-sin 2; Meaning: South]

However, I think the translation of the name is very good, which reflects his character and is the kind of person who goes his own way.

(2) Ode to guess

Thai:? [Pronunciation: som2-chaay1; Meaning: very manly]

This is totally rubbish translation.