Heron-Marked Blade | Full Build & Sword Testing - Black Beard Projects

I've always thought it was a two handed Falchion/Langesmesser combination. I'm trying to remember who else carried Heron marked blades. I know Lan did, but it's been so long since I've read the books I can't remember who else. Others think it is a Kantana/Shamshir styled blade. Yet others think it's a long hilted saber.

What do you think Rand Al'Thor's sword looks like?