yes it is

"Ah Mimir" in Spanish translates to "Oh Mimir" in English. It is an expression used to show surprise, frustration, or emphasis in a conversation.

His uncle, the Jotun Mimir. Or ... more accurately, Mimir's head. Mimir was sent as part of an exchange of hostages to show faith to the Vanir tribe of Gods after their war, along with Hoenir. Hoenir was not the brightest of people, and relied on Mimir's council. When the Vanir saw this, they cut off Mimir's head and sent it back to Odin. Odin then basically pickled the head and spoke magical charms over it, and it would speak to him when he consults it.

Time to sleep

Mímir, who was a friend of Odin. A jötunn, most likely.