Battleaxe
There are many specific forms of the battleaxe. Most are about the length of a longsword to a broadsword. They usually have twin blades on both sides. The Greek heavy infantry used a variety of a battleaxe called the labrys. It was a double bladed axe, but what's strange is that the shaft is quite small. This axe would've probably only been used with one hand, but there is always the two handed option.