They are identified by Heritage as "late Byzantines" though how accurate that is I don't know Two handed axes aren't something I associate with Rome or its successor state I do vaguely recall the Byzantine emperors hiring Norse Mercenaries so maybe that is the inspiration. My guess is the shield would be used on the defence with that short sword and the axe used on the offencive (though using it with that shield slung on my shoulder could be awkward.
Still these seven fellows (there were 8 to a box but I used one for another project) do make a formidable looking group that should serve well in fantasy or historical games. They are 25mm scale so another 35 points.
Wow Adam you have had a full weekend. These look like very old school Varangians, I'd say mid 1970s. The shields are typically shown as kite shaped these days, and normally they'd be strapped on the back for axe work. Your repurposing of them for Dragon Rampant makes a lot of sense, and this will make a fine unit. I like the unit identification, and White Willow seems a good generic fantasy association. Good effort on the shields, I support hand painting. And yes there is a stylized will tree visible.