What is the name of the captain on Star Trek?

Star Trek TOS (the original series) : James T. Kirk

Star Trek TNG (The Next Generation) : Jean-Luc Picard

Star Trek VOY (Voyager, not Enterprise) : Kathryn Janeway

Star Trek ENT (series Enterprise) : Jonathan Archer

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Star Trek captains on all 5 live-action TV series :

James T Kirk - Star Trek (the original series 1966-1969)

Jean-Luc Picard - Star Trek: The Next Generation (1987-1994)

Benjamin Sisko - Star Trek: Deep Space 9 (1993-1999)

Kathryn Janeway - Star Trek: Voyager (1995-2001)

Jonathan Archer - Star Trek: Enterprise (nee Enterprise 2001-2005)