Kiru

Mack was actually a high school nickname from the football team. That's American football, not what the rest of the world calls football. My teammates found it highly amusing to nickname the 5'9" 132 pound blocking fullback and wedge buster...

We called the position "Kamikaze" literally my job on the kickoff coverage team was to run full speed down the hill and slam into as many second-line blockers as possible. I was far better at it than I should have been given that I was about 50 pounds smaller than everyone else on the team... at minimum. But I digress...

Mack, after the humongous Mack Trucks you see driving around. So, now there is Mack.

Isn't Mack's profile picture that Godfree guy from the anime?

Iskandar aka Alexander the Great from the Fate series