Tashmishu

Šuwaliyat is a Hittite god. His Hurrian correspondence is Tasmisu.

Šuwaliyat is the brother of the most important Hittite god Tarḫunna. In the Hurritian-Hittite "Ullikummi song" Šuwaliyat seems to be the wind or storm traveling around with weather god Tarḫunna. He is also the vizier and older brother of Tarḫunna. The other sibling of Šuwaliyat is Aranzah. In Hurrian-Hittite mythology he visits the goddess Lelwani in underworld together with Tarḫunna.

...
Wikipedia