Readings for 安 as しずか (Surname)

Question

Is it possible to read 安 as しずか shizuka? Kanshudo.com has this pronunciation as an additional reading for a surname:

https://www.kanshudo.com/name/%E5%AE%89

I wanted to do some research before asking you all this question, so I already checked on Jisho.org and Wiktionary where the only readings that were mentioned were:

Kun: やす.い、 やす.まる、 やす、 やす.らか
On: アン

Go-on: あん (an, Jōyō)
Kan-on: あん (an, Jōyō)
Kun: やすい (yasui, 安い, Jōyō); やすらか (yasuraka, 安らか); やすんじる (yasunjiru, 安んじる); いずくんぞ (izukunzo, 安んぞ)
Nanori: あ (a); あす (asu); あず (azu); あっ (a'); や (ya)

What adds to my confusion is that 静か ('quiet') seems to be the normal way to write しずか.

I'm taking an uneducated guess that this reading for 安 must be uncommon, because neither Jisho.org nor Wiktionary have しずか as a possible reading. So is it possible to read 安 as しずか for a surname, even though 静か is the normal way of writing the adjective 'quiet'? Would 安 (しずか) as a surname be too strange or weird, or just uncommon?

Answer 1

The characters appearing in the 戸籍 koseki (family register) are publicly accessible. As far as I can tell, one cannot search how common a name is, or in what combinations they appear. But from this data we can rule out that 安 is a surname with reading しずか. 安 is listed with the following readings:

音読み アン
訓読み やすい、いずくに、
いずくにか、いずくんぞ、やすんじる

6画

On the other hand, some of the kanji appearing in the koseki with reading しずか (in total 11, including 静) are the following:

音読み ジャク、セキ
訓読み さび、さびしい、さびれる、
しずか

11画 音読み セン、ゼン
訓読み ゆずる、しずか


15画 音読み タン
訓読み しずか


16画 音読み ヒツ、ビツ、ミチ
訓読み しずか


17画 音読み セイ、ジョウ
訓読み しずか


16画 音読み ゲキ
訓読み しずか


18画