I would venture the suggestion that it's composed of the Germanic elements
gisel meaning "pledge" or "hostage" (as seen in
Giselle) and
hard meaning "brave" or "hardy" (as seen in
Eberhard and
Hartmann).
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.