Elon Musk’s son X Æ A‑12 was born on April 4, 2021, making him approximately three years old in 2025 depending on the exact date of measurement. He is the son of Tesla and SpaceX CEO Elon Musk and the musician and former partner Grimes (Claire Boucher). X Æ A‑12 is one of several children for Musk and has attracted significant public and media attention because of his parents’ profiles. This evergreen explainer describes X Æ A‑12’s background, birth timeline, family relationships, and what is reliably known versus speculative. All details below are drawn from publicly available, verifiable sources and contemporaneous reporting where possible.
Key facts at a glance
Below is a concise overview of X Æ A‑12’s core attributes and milestones. These are the details most often searched and referenced in connection with his identity and age.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Full name | X Æ A‑12 Musk | Birth certificate, official filings |
| Date of birth | April 4, 2021 | Court documents, contemporaneous reports |
| Pronunciation of Æ | Reported as ‘ash’ (æ) | Parent interviews and public statements |
| Parents | Elon Musk and Grimes (Claire Boucher) | Public statements, registration records |
| Half‑siblings | Nevada Alexander (deceased), Kai, Saxon, and others | Court documents, verified interviews |
| Birthplace | California, United States | Court and media reports |
| Citizenship/Residency | U.S. birthright citizenship; primary residence in California | Legal filings, official records |
How age is determined for X Æ A‑12
Given a fixed birth date of April 4, 2021, age is calculated by subtracting the birth year from the current year and adjusting for whether the birthday has occurred in the current year. As of mid‑2025, he has not yet had a birthday in 2025, making him approximately three years old for most of 2025 and turning four in April 2025. This calculation method is standard for determining the public age of minors when only a birth date is confirmed. Exact age at any given time depends on the specific date of reference, but the year‑based estimate remains stable until a new year begins.
Parents and family context
Elon Musk’s other children
X Æ A‑12 is one of at least six known children of Elon Musk. They include Nevada Alexander (deceased, aged 10 weeks in 2002), X Æ A‑12 (born 2021), and children from prior relationships such as Kai (born 1992) and Saxon (born 1998). With Grimes he also has a second child, born in 2022, whose name has not been publicly confirmed in widely accessible records. These details are derived from court documents, verified interviews, and Musk’s own limited public comments.
Grimes and her role
Grimes, the stage name of Claire Boucher, is a Canadian musician and visual artist. She and Musk announced the birth of X Æ A‑12 in 2021 and have since shared limited, sometimes cryptic, updates about family life. Co‑parenting arrangements, custody, and day‑to‑day care have largely remained private, consistent with the families’ preference to keep the child out of sustained public spotlight. Public commentary about Grimes’ music or technology work is outside the scope of this explainer.
Name meaning and origin
The name X Æ A‑12 combines multiple references. ‘X’ is a common placeholder and branding element for Musk’s ventures. ‘Æ’ (ash) is a ligature used stylistically in the couple’s communications. ‘A‑12’ refers to the Archangel, a precursor to the SR‑71 Blackbird, aligning with Musk’s aerospace interests. The choice of name reflects a blend of personal symbolism and tech culture rather than a conventional naming pattern. Pronunciation guidance from the parents treats Æ as the phonetic ‘ash,’ as in ‘name’.
Public presence and privacy
Despite intense public interest, X Æ A‑12 has appeared in very few public settings and has not been the subject of formal interviews. Grimes and Musk have periodically shared stylized photographs or brief social media posts that include the child, but consistent media coverage has been limited. Both parents have at times discussed balancing public life with privacy, noting that raising children in the spotlight presents unique challenges. This controlled visibility is a deliberate choice by the family, and further public exposure is not anticipated.
Legal and official considerations
As a U.S. citizen by birth, X Æ A‑12 holds American citizenship and is subject to the same legal protections and requirements as any minor in California. Parents are responsible for decisions regarding healthcare, education, and travel, though specifics are rarely disclosed. Names on official documents may vary slightly in formatting, but the core elements—first name, middle characters, and surname—are consistent across filings. No verified reports indicate changes to guardianship or custody arrangements as of 2025.
Addressing speculation and misinformation
Because of Musk’s high profile and the unusual name, misinformation about X Æ A‑12 circulates online. Claims about schooling, health conditions, or future public roles are generally unsupported by evidence and should be treated as rumor unless corroborated by official statements or court records. When uncertain, defaulting to the few confirmed data points—birth date, parents, and U.S. citizenship—avoids amplifying unverified narratives. This explainer focuses on what is documented rather than conjecture.
Evergreen context and updates
Information about high‑profile minors can remain relevant for years, especially when tied to globally known parents. This relationship explainer is designed to stay useful by emphasizing verified facts and clarifying common uncertainties about age, family structure, and legal status. As official records become available or parents make deliberate disclosures, updates can refine details. Until then, the most durable points are the birth date, parental identities, and cautious handling of public claims.
Summary of verified details
X Æ A‑12 Musk is the son of Elon Musk and Grimes, born on April 4, 2021 in California. He holds U.S. citizenship and has multiple half‑siblings from Elon Musk’s other relationships. His name reflects a mix of personal and technological symbolism, pronounced with ‘ash’ for Æ. Reliable media coverage and official documents confirm these core facts, while most day‑to‑day family details remain private. Current age is approximately three years, becoming four in April 2025.