It means "Friend" and "Welcome" in Chinook, simple as that.
Tilikum is a friendly name, not one of malice.
af Chiropterace 3. september 2014
From the greek root 'tilikumas' meaning 'killer of innocents'
Tilikum sure is one killer whale!
af BadSenseOfHumor 24. februar 2010
From the ancient sanscrit language, which is read backwards. Mukilit; defined as Mutiliate, Kill It.
Tilikum sure did mutiliate and kill it.
af DrPearl 25. februar 2010