Where does “सुरत थानी” come from?

सुरत थानी (Hindi) comes from Thai สุราษฎร์ธานี, from Thai ธานี, from Pali dhānī, from Sanskrit धानी — house, home; city.

Ancestry of “सुरत थानी”, step by step

Step	Language	Word	Meaning
1	Thai	สุราษฎร์ธานี	—
2	Thai	ธานี	city
3	Pali	dhānī	city; abode; etc; city
4	Sanskrit	धानी	house, home; city

सुरत थानी — Etymology, Origin & Word History | Etymology Explorer