Key facts about Elon Musk's sons' names
Elon Musk has six children across multiple relationships. Their names—X Æ A-12, Musk, Kai, Saxon, Damian, and Griffin—are drawn from varied inspirations, including fiction, mythology, pop culture, and family preferences. This explainer lists each son, their birth year (where publicly documented), the known origin and literal meaning of their given name, and how these choices reflect Musk's stated interests in technology, science fiction, and futuristic themes. Details below are drawn from court records, interviews, and Musk's own public comments where available.
| Name (birth name) | Year of birth | Origin / literal meaning | Source type |
|---|---|---|---|
| X Æ A-12 (pronounced "ex ash a twelve") | 2020 | Neo-futuristic compound coined by Musk and Grimes; "A-12" references the Archangel 12 spy plane (successor to SR-71) | California birth filing; Musk/Grimes interviews |
| Kai Musk | 2021 (twins, via surrogate) | Kai is a Hawaiian name meaning "sea"; also a Scandinavian name meaning "willow" | Public reports; name registry records |
| Saxon Musk | 2021 (twins) | Saxon refers to the Germanic tribe and Old English ethnic group; rooted in historical tribal identity | Public reports; name registry records |
| Damian Musk | 2021 (twins) | Damian derives from Greek "Damianos," meaning "to tame" or associated with Saint Damian, a historical Christian figure linked to healing | Public reports; name registry records |
| Griffin Musk | 2021 (twins) | Griffin is a legendary creature with lion's body and eagle's head; name of a Martian crater and aircraft manufacturer | Public reports; name registry records |
| Nevada Alexander Musk | Nevada is a Spanish name meaning "snow-covered"; Alexander is Greek meaning "defender of the people" |
X Æ A-12: a name built for the future
The most discussed of Musk's children is X Æ A-12, born in 2020 with then-partner Grimes (Claire Boucher). The name is a constructed, stylized choice rather than a traditional given name. Musk filed the birth name initially as X Æ A-12 in California, later adding the more conventional "X AE A-12 Musk" to comply with official formats. Grimes explained that the "X" stands for the unknown or variable in math; "Æ" is an elven alphabet character they use to represent "ai" or artificial intelligence; and "A-12" refers to the Lockheed A-12 reconnaissance aircraft, a precursor to the SR-71 Blackbird. Taken together, the name evokes themes of technology, artificial intelligence, and aerospace—core motifs in Musk's public work.
Kai and Saxon: myth, history, and everyday readability
Musk's twins, born in 2021 via surrogate, share names that draw from different traditions. Kai is short, cross-cultural, and widely usable: in Hawaiian it means "sea," while in Scandinavian contexts it can mean "willow." Saxon references the early medieval Germanic people of Britain, a nod to historical ethnic identity and Old English heritage. Both names are straightforward to pronounce and practical for daily use, contrasting with the highly invented X Æ A-12.
Kai at a glance
- Hawaiian origin: "sea"
- Scandinavian parallel: "willow"
- Simple, globally legible spelling
Saxon at a glance
- Ethnolinguistic name: Germanic tribe of early English history
- Rooted in toponymic and historical identity
- Shares the Saxon spelling tradition (e.g., X Æ A-12's use of hard " Saxon" sound)
Damian and Griffin: myth, symbolism, and imagination
Damian derives from the Greek name Damianos, meaning "to tame." In Christian tradition, Saint Damian was a physician and martyr, giving the name associations with healing and service. Griffin combines myth and engineering: the griffin is a legendary hybrid creature, and the name also appears on a Mars crater and several aircraft, aligning with Musk's interests in space and aviation.
Damian at a glance
- Greek origin: "to tame"
- Namesake: Saint Damian, historical Christian healer
- Soft, classical European usability
Griffin at a glance
- Mythological creature: lion's body, eagle's head
- Shared with Martian surface features and aviation programs
- Evokes exploration and strength
Nevada and Alexander: place, history, and timelessness
Nevada Alexander Musk, the eldest known child, born in 2002, carries a geographic and historical double-barreled name. Nevada is a Spanish toponym meaning "snow-covered," referring to the U.S. state's landscape. Alexander is widely used across many cultures and derives from Greek "Alexandros," meaning "defender of the people." By combining a place name with a classical hero name, the choice reflects both geography and enduring archetypes.
Patterns in Elon Musk's naming approach
Across his children's names, Musk demonstrates a clear preference for uncommon, concept-rich choices. He blends technological abbreviations (X, A-12), non-Western phonetics (Kai), historical tribal names (Saxon), mythological creatures (Griffin), classical virtues (Damian), and geographic identifiers (Nevada). The recurring themes are exploration—whether aerial, space, or cultural—and a departure from conventional Anglo-centric naming. These patterns suggest a deliberate alignment between name semantics and Musk's public identity as an innovator and futurist.
Frequently asked questions
- How many sons does Elon Musk have?
- Is X Æ A-12 a legal name?
- What does Kai mean?
- Why is one son named after a plane?
- Are all the names inspired by tech or sci-fi?
Not all. While names like X Æ A-12 are tech-forward, others draw from mythology (Griffin, Damian), history (Saxon), language (Kai), and geography (Nevada).
He has six children of whom five are sons: Nevada Alexander, X Æ A-12, Kai, Saxon, Damian, and Griffin.
Yes. California vital records list the birth name as X Æ A-12, with the formatted rendering "X AE A-12 Musk" used in official documents.
Kai means "sea" in Hawaiian and, in Scandinavian usage, can mean "willow."
The name A-12 references the Lockheed A-12 reconnaissance aircraft, a high-speed aerospace project, aligning with Musk's interest in advanced vehicles.