The name for the Seminole chief is Tastanagi. It is in the original script of the pilot.

Also, the description of Buck's character in the opening paragraph as taken from the old MGM site is totally off. Womanizing, I will grant you, though I wouldn't describe him thus. However, Buck is not "hard-drinking" (at least no more so than any of the seven except perhaps JD) and he is not Irish. That description may stem back to the original intent, which was to kill Buck in the pilot and replace him with Daragh O'Malley's ex-confederate sergeant, Francis Corcoran.