Irish
Nope. The Sken Duh is a Scottish invention from around the 1200 Century or so. The Irish had no need for whimpy little sock blades.
I'm in a historical research organization and my 'era of interest' is 400BC - 600AD Ireland. "Greywind', my sword, is a reproduction 34" Irish leaf shaped blade with oak grip and bronze pommel and quillion. "Cat's Paw", my dress dagger, is a similar shapped blade only scaled down to 20 inches of double edged steel. Again, oak and bronze.
My working/eating dagger is a sax norse knife single edge design and fits against the small of my back quite well.
My 'persona' [the person I study to be if I had lived then] is a middle age Irishwoman working a weaving/dyeing crafthold willed her by her mother under Brehon law. Being as it's now 605 AD [at least, that's what the Irish Catholic Preasts tell us] it's well before the Synod of Tera where women's rights of inheritance, fighting for self and land, etc were removed by the high king - the Ard Righ.
Jack's weapons would be of strong and solid steel, all ready for cleaving an errant Pict or very lost Roman. And, later on, the Norse.
Besides, charging into battle with nothing but your sword and shield or spears, a "lot" of bare skin [say, in some cases naked] and san body protection save what was painted on with blue word and sporting a 'hard on'
usually scared the opposing forces ... for a least enough time to get the first swings in. And those tactics are historically documented.
Kinda give it a whole new picture.
Hope Jack likes blue.