Yama
Heaven which rests entirely on air.

[Ref: The Wheel of the Law - Alabaster Henry (1871) - Trubner & Co, London - page 308.]
Yak
Genii Yah, or Yakkhas - A kind of demon, represented in Siamese temples as enormous and horrible, though somewhat human in form.
They are not absolutely evil, for Buddha himself passed through the state of Yak, whilst on his transmigrating journey towards
perfection. They are often associated with the angels [Kumphan angels], but are more often represented as of evil than of good
disposition.

[The Weel of the Law - Henry Alabaster  (1871) - Trubner & Co, London - page 178.]
Yoht
Traditional Thai unit of length equal to 400 sen or 16 Km.
Yukhanthon
One of the mountains surrounding Mount Meru, the centre of the universe in the Three Worlds cosmic geography.

[Ref: Reynolds and Reynolds - page 276-8]
Yumna
River, with lotus; One of the five great rivers. There are five similar figures representing the five great rivers (Maha nathi), whose source
is in the Himalayan lake Anodat. They are named Kongkha (Ganges), Yumna, Achirawadi, Saraphum, and Mahi.

[Ref: The Wheel of the Law - Alabaster Henry (1871) Trubner & Co, London - page 307.]
   
   
Y