What's the nationality of the surname "McJunkin"?

Question:

What's the nationality of the surname "McJunkin"?

Best Answer - Chosen by Asker: Well, I'm no expert on this, but almost all names that start with "Mc" are Irish or Scottish.
You may want to start there.

Here is something that I found on the net under name origins, which substantiates my initial thinking:

"First is Patronymics or derivation from the fathers name, such as McJunkin and McClanahan, or O'Carney. The Mac and O' prefixes are used in Scotland and Ireland to mean "son of" and "grandson of" or "descendent of."

Hope this helps!!