The parents' decision to name a child is made for them because they are informed of their offspring's future self, and the name of that future self, due to some sort of insight into the future.
For instance, when a woman's baby's daddy time-travels from the future back to the 1980s to protect her from a killbot. Or when a father knows what to name his daughter because she comes back in time to say, "Hi, I'm your future daughter named Lulu." Or a psychic tells mom and dad about their future son, Abobo. Or the virgin Mary being told by an angel about her upcoming pregnancy with baby Jesus, making this one Older Than Feudalism.
Usually a form of Stable Time Loop, unless time travel is not involved, such as when a woman has a psychic link with her unborn child.
Not the same thing as Namedar.
- Justified in ElfQuest because elf mothers communicate telepathically with their foetuses, and get to know possible powers or personality traits to name them after.
- From Neil Gaiman's The Sandman, after Lyta Hall gives birth, she can't decide what to name the baby until she's told by Morpheus that her son is named Daniel.
- Not really an example, since this didn't involve any sort of time loop. Unless the pre-verbal Daniel chose that name himself and conveyed it telepathically to Morpheus, which isn't that far-fetched for a baby gestated inside of dreams.
- Sarah and John from Terminator, trope namer from the first movie where Kyle tells Sarah about John, to which she replies, "At least now I know what to name him."
- A Nightmare on Elm Street 5: The Dream Child Alice meets a little boy in her dreams named Jacob who, it turns out, is her future son.
- Back to the Future: "Marty, what a nice name!"
- The Time Traveler's Wife: they decide to name the daughter after he's met the future version of the daughter, who tells him her name.
- The Bible, Luke 1, has two examples: An angel orders Zechariah to name his next son John. When he disbelieves that his wife was even pregnant, the angel gives him a bad case of laryngitis until Zechariah eventually writes on a writing tablet that the child's name will be John. Another angel tells a virgin named Mary that she is about to give birth to a son and name him Jesus.
- Those aren't the only ones. There are a few others, not the least of which were the children of Hosea, with such meaningless names as (translated from Hebrew) 'not my people' and 'not your God,' just before God was to send the Hebrews into exile following a foreign conquest.
- In Once a Witch, Tamsin is so named because she went back in time, met her grandmother, and said her name was Tamsin.
- In Building Blocks by Cynthia Voigt, a boy named Brann accidentally goes back in time and befriends his father as a ten-year-old. He comes to realize his father named him after this childhood friend, whereas before it had been a mystery where he'd come up with a name no one had heard of and why he was so uncharacteristically insistent on using it when Brann was born.
- Terminator: The Sarah Connor Chronicles, episode "Allison from Palmdale" - Cameron's visage is based on a girl from the future named Allison. Cameron goes back in time and suffers a bit of Identity Amnesia, making her believe that she actually is Allison. Cameron calls Allison's mom and asks for help, but Allison's mom says that she doesn't have a daughter. At least not yet, because she is pregnant, and Allison's mom says that Allison is a "very pretty name."
- Phoebe gets one when she time travels to meet her pregnant mother, who remarks how obvious it is that she would choose another P name and that "it's not too late to change it." She also briefly says that she must have named Phoebe after her favorite aunt.
- Piper and Leo's second son is named Chris, and the only reason they know is because he came back in time. It is briefly mentioned that in the unaltered timeline he was named after his paternal grandfather.
- Piper and Leo's third child, Melinda, is named after their daughter from an alternate future.
- In the Doctor Who episode "Let's Kill Hitler" we discover that Amy Pond named her daughter Melody after her best friend Mels. Who turns out to be ... her daughter Melody.
- River Song got her name from the Doctor, who got her name from a future version of River. The name's origin is explained, though. Just be warned: Spoilers! River is Melody Pond's third and final regeneration, and the name "River Song" comes from a mistranslation of "Melody Pond". In other words, she got her name from herself, twice.
- In the Norwegian children's TV series Broderne Dal og spektralsteinerne, three time-travelling brothers end up having an adventure as adults with their father as a youth, when he is a member of La Résistance in Norway during the German Occupation of World War II. In the end, he asks the names of the people who helped him, and assures them that if he ever gets three sons, he will name them after them. (He has no idea who they are, of course).
- In Jak and Daxter a young boy is found wandering the city. He is referred to only as "the kid" and none of the characters learn his actual name. Later it is revealed the kid is actually Jak himself before he was sent back to the past to grow up to be the hero he is today. Although not a biological parent, it can be assumed that Samos started calling him that after taking him back to Sandover Village.
- In Sin and Punishment, Achi shows Airan a Storyboarding the Apocalypse sequence to convince her to subdue Saki. In this sequence, she is accompanied by a young child named Isa ("I can even write it in kanji!"), who turns out to be Saki and Airan's son. Airan takes this revelation to heart, as one of her main priorities in the ending is to make sure that Isa is born at the right time. And, wouldn't you know it, Isa is one of the main characters in the sequel.
- In the future arc of Arthur, King of Time and Space, Morgana ended up naming her and Arthur's child, who was sent back in time, after an impressive ensign aboard the Excalibur. They end up conversing and she realizes she named her son, Mordred, after his future self.
- General Protection Fault, Ki meets her son from the future.
- In one episode of Peter Pan & the Pirates, Peter brings another girl to Neverland, a pigtailed creature called Jane. The cast eventually works out that Peter accidentally went into the future and collected Wendy's daughter. She goes back at the end of the episode.
- In a time travel episode of Totally Spies!, the Spies mistake Mandy's mother for her and call her by that name. She says she doesn't know who they're talking about, but thinks that Mandy is a very nice name...
- In the time travel episode of American Dragon: Jake Long, Jakes parents are at an end-of-the-year high school party watching Haleys Comet. Jakes dad mispronounces the name as Hallie, to which Jakes mom responds with the correct pronunciation, then muses how shes always liked the name Haley, which of course, is the name of Jakes little sister.