I'm about to begin homebrewing magical handaxes. These handaxes will do lightning damage. I'm not sure what to name them, a friend suggested Storm Hatchets which I'm not opposed to but I'd like to hear other ideas if you have any.

Primeval Thunder - These two crude flint (stone) handaxes have handles made from an ancient tree. They are well worn and almost polished smooth. Just handling them, you feel the power of the storm. When attuned to you they shed a blue light that crackles with electric energy giving off illumination to 10 feet. When thrown they are a streak of iridescent light that leaves a wake of sparks and the smell of ozone.

Echo Axes - These two and axes look oversized for their use. The wielder has no difficulty with them once attuned. They have (some thunder property) that when used the sound  reverberates through the area for 100 feet echoing and answering back as if in a thunderstorm. 

A matched pair called Anode and Cathode.

Thank you so much. I ended up using parts of your descriptions instead because they were so beuatiful. 

You are very welcome.

Treefeller and Trunksplitter.

Two axes, each of which has handles carved from opposite sides of an oak that was split by lightning. One does lightning damage the other does thunder damage. They are attuned together as one item and only display magical properties when both present together.