Futhorc
Cweorð is the honest blank in the row. The name is unattested anywhere else in Old English, there is no stanza, and the fire-drill reading is a guess resting on a guess about a hand-quern. Old English wrote /kw/ perfectly well with two letters it already had, so the likeliest reason this one exists is that a scribe wanted the runic alphabet to lie against the Latin one without a gap. Today, find what you are doing purely for completeness. Something on your list is there so the list is not short, and it will not get better by being done well.