History OnlyOneName / LiveActionTV

* Series/TheRandomYears: Wiseman is ever only called by that one name during the series' four-episode broadcast run.

* Monty in ''Series/PowerRangersNinjaSteel''
* Blaze and Moxy in ''Series/PowerRangersBeastMorphers''

*** Well, the majority of the humans in the Milky Way were ruled, and thus had their cultures influenced by, the Goa'uld, whereas the Pegasus Galaxy and post-Goa'uld Earth were more influenced by the Ancients. That could be one way of hand-waving the entire problem.
*** Except most Ancients in the show don't have last names, either.
*** A lot do. The first one SG-1 meets is Oma Desala. The first one the Atlantis team meets is Chaya Sar. The one SG-1 meets ''in'' Atlantis is Ganos Lal, aka Morgan le Fay. (In the latter name, 'Le Fay' is an epithet — La Fée (The Fairy) or Fata Morgana — not a surname.)

* ''Series/BurnNotice'': Most of the people Michael Westen crosses swords with. Most of the [[MonsterOfTheWeek job of the week villains]] will not be given more than one name, while many others will be given full names in passing which are never referenced again. All of the MythArc villains tend to go by singular names that are most likely pseudonyms (for example, Carla, Victor, and Simon).

* ''Series/WhoseLineIsItAnyway'': In one game of "Whose Line", Ryan (as [[Film/StarWars Obi-Wan Kenobi]]) says "From now on I want to be known as Helen."

** Klingons have a {{UsefulNotes/patronymic}} ("[[IAmXSonOfY Worf, son of Mogh]]") and a House name ("Worf of the House of Mogh", later the House of Martok), but do not have true last names. Worf's circumstances are interesting because he was raised by human parents but apparently never took their name, Rozhenko.

** But [[Series/PowerRangersSamurai Emily, Kevin and Mike]] are completely human, and are not given full names. This is quite ironic, because the Samurai Rangers come from {{Heroic Lineage}}s, and three of them five are left nameless because of this trope.

** Most alien-but-still-human-ish Power Rangers, such as Andros and Karone, or Maya. ''Time Force'''s resident alien, Trip, has a very popular {{Fanon}} last name purported to come from scripts or casting sheets, but unlike other such surnames (e.g., Billy Cranston, Katie Walker), it wasn't included on Disney's official website.

* In ''Franchise/SuperSentai'', this is generally used for Rangers not from modern Japan, like the [[Series/KyoryuSentaiZyuranger Zyurangers]] (prehistoric times), [[Series/NinjaSentaiKakuranger Kakurangers]] (ancient Japan), [[Series/SeijuuSentaiGingaman Gingaman]] (Ginga Forest), [[Series/TensouSentaiGoseiger Goseigers]] (Gosei World) and [[Series/KishiryuSentaiRyusoulger Ryusoulger]] ([=RyuSoul=] Tribe), as well as some of the [[Series/MiraiSentaiTimeranger Timerangers]] (the future), [[Series/DoubutsuSentaiZyuohger Zyuohgers]] (Zyuland), and [[Series/UchuSentaiKyuranger Kyurangers]] (other planets). Exceptions to this rule include the [[Series/HikariSentaiMaskman Maskmen]], [[Series/GoseiSentaiDairanger Dairangers]], and [[Series/ResshaSentaiToqger Toqgers]] (the last of whose case can be chalked up to their LaserGuidedAmnesia).

** Ernie, in his appearances in the franchise from ''Series/Mighty Morphin Power Rangers'' through the ''Series/PowerRangersTurbo'' film, is only given a first name, though there was at least one instance in ''Series/PowerRangersZeo'', where we should have given a surname. ''Series/PowerRangersMegaforce'' also has a character named Ernie who, like the first Ernie we meet, is only given one name.

** None of the named Romulans (e.g. Sela, Donatra, Tel'Aura, Tomalak) appears to have a last name. Given that they're an offshoot of Vulcans, this may be a JustifiedTrope. However, at least one non-canon novel has a character refer to a Romulan by name. Specifically, Captain John Harriman (the inept captain of the ''Enterprise''-B, whom the book turned into a badass) purposefully calls Admiral Vokar by his first name Aventeer, knowing the latter would perceive it as an insult. There is one exception to this, Admiral Alidar Jarok. Though you'd be forgiven if after watching the episode he appeared in you made the mistake of thinking "Alidar" was an alias rather than his first name.

*** Well, the majority of the humans in the Milky Way were ruled, and thus had their cultures influenced by, the Goa'uld, whereas the Pegasus Galaxy and post-Goa'uld Earth were more influenced by the Ancients. That could be one way of hand waving the entire problem.

*** A lot do. The first one SG-1 meets is Oma Desala. The first one the Atlantis team meets is Chaya Sar. The one SG-1 meets ''in'' Atlantis is Ganos Lal, aka Morgan le Fay.