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Caroline Bologna “California Officials Say Elon Musk Isn't Allowed To Name His Baby X Æ A-12” https://www.huffpost.com/entry/elon-musk-baby-name-california-not-allowed_l_5eb41bd9c5b652c56473f63b

日本式に言えば、〈キラキラ・ネーム〉（〈DQNネーム〉）案件*1ということになるのだろうか。
５月５日、イーロン・マスク *2とグライムス*3の間に、男の子が誕生したが、その名前は X Æ A-12*4。父親と母親の間で、その発音に関する見解が異なるということも露呈したが*5、それよりも話題になっているのは、カリフォルニア州当局がこの X Æ A-12という名前を果たして受理するのか否かということ。

The California Department of Public Health’s vital records office issues a handbook with guidelines for permissible names. According to that handbook, only “the 26 alphabetical characters of the English language” and “appropriate punctuation” (like hyphens, apostrophes, periods and commas) can appear on vital records like birth certificates.
“No, a name like ‘X Æ A-12’ would not be allowed,” a spokesperson for CDPH told HuffPost, adding that numerals, pictographs, ideograms and diacritical marks such as accent marks do not adhere to the guidelines.
These guidelines aren’t technically laws, so you can’t necessarily call the couple’s chosen baby name illegal. But the effect is similar: X Æ A-12 will not be accepted as the child’s legal name.
“Typically when you have a baby, you fill out a form at the hospital and it’s entered into a computer system. My guess is if they tried to enter this name, the computer would just reject it,” said Carlton F.W. Larson, a professor at UC Davis School of Law who published a 2011 paper on parental naming rights.
“Likely he’d be told you can’t have this as a name on a birth certificate,” he added. “You’d have to enter something else. I think the X and A are OK, but the 12 and the Æ symbol wouldn’t be allowed.”

なお、要するに、数字と記号は駄目ということになる。
このカリフォルニア州のガイドラインは、ラテン系の人名を巡って、問題になったことがある；

California’s baby naming rules have come under fire in the past, particularly because diacritical marks are common in Spanish and the state has a large Latinx population*6. The state legislature has explored ― and even passed ― some bills to allow diacritical marks, but those bills have failed to become law, reportedly due to the how much it would cost to update the state’s computer systems*7.

羅馬字は殆どの言語に対応可能な最も汎用性の高い表記システムといえるだろう。しかし、それは26文字だけでなく、アクセント記号を初めとした補助的な記号あってのことだろう。アクセント記号も駄目というのは、却ってアルファベットの汎用性を損なうことになるのでは？　
ところで、ヘヴィ・メタルのファンが子どもの名前にメタル・ウムラウト *8を使ったらどうなるのかと思った。
最後に、円満字二郎『人名用漢字の戦後史』*9をマークしておく。

人名用漢字の戦後史 (岩波新書新赤版 (957))

作者:円満字二郎
発売日: 2005/07/20
メディア: 新書

*2:https://twitter.com/elonmusk

*3:http://www.grimesmusic.com/ https://twitter.com/Grimezsz

*4:See Jenna Amatulli “Elon Musk And Grimes’ Baby Boy Has Arrived And Here Are Photos” https://www.huffpost.com/entry/elon-musk-grimes-baby_n_5eb19353c5b621964fad431d Carly Ledbetter “Elon Musk Corrects Grimes’ Explanation Of Son’s Name And Grimes Fires Back” https://www.huffpost.com/entry/elon-musk-grimes-explain-sons-name_n_5eb30b0ec5b6dbd807b4dbdc

*5:See Jack Guy “Elon Musk and Grimes reveal how to pronounce baby's name -- but they disagree” https://edition.cnn.com/2020/05/08/entertainment/elon-musk-grimes-baby-name-pronunciation-scli-intl/index.html

*6:See Louis Freedberg “PERSONAL PERSPECTIVE / Claim your name” https://www.sfgate.com/opinion/article/PERSONAL-PERSPECTIVE-Claim-your-name-2764520.php

*7:See Jazmine Ulloa “What's in a name? This bill would allow accent marks on California birth certificates” https://www.baltimoresun.com/la-pol-ca-essential-politics-updates-what-s-in-a-name-this-bill-would-allow-1484349959-htmlstory.html

*8:See https://sumita-m.hatenadiary.com/entry/20160207/1454861892

*9:Mentioned in https://sumita-m.hatenadiary.com/entry/20091103/1257275112 https://sumita-m.hatenadiary.com/entry/20100104/1262578368