Excellent finds Mark!
I can agree that the knob-ends on the quillons seem to be a germanic trait (Austrian to be more precise).
The last sword has some very interesting fullers. Namely, 3-4 fullers, very narrow, very close together. This type of fullers will become quite common on sabre/dusack and backsword blades (of Austrian or North Italian manufacture) later on. Checkout these two Hungarian sabres, my guess from the 1550s to the 1590s. Also notice the gold wire wrap, another common trait on these mid-to-late 16th century Hungarian (and sometimes Polish) sabres. Makes me wonder if the wire wrap on the first sword you posted is a later addition.
http://www.vikingsword.com/vb/showpo...9&postcount=39
https://skd-online-collection.skd.mu...s/Index/284576
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I found this one, but can't get mo info on it.
https://www.pius-kirchgessner.de/05_...e/Petrus_2.htm
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One thing that puzzles me is the lack of one-handed examples, other than those on Dobromir's frescos.