Fisherman's?
good one... fishermen used mostly large cleavers, sometimes of special form. Here in Israel, they like the british WWII machetes.
I have to see its other side and geometry - is it canted, "side axe", or symmetrical.
Either way, it is a very nice european woodworking axe, judging from it shape to be 17th to late 18th century. That shape has currently been defined as "beheading axe" (not so wrongly though).
Weight & size of the axes are the reasons I have chosen the fence segments - it is very strong, can support the weight and also distribute the weight suspended from the wall. Wood beams will do as close.