であろうと

whether ... or ...

→ だ
phrase Rare #30,237
whether ... or ... A formal or literary construction meaning “whether it is ... or ...” or “no matter what ...”. It is often used with contrasting phrases such as であろうとなかろうと.
JA: 彼が誰であろうと、私には関係ない。
EN: No matter who he is, it doesn't matter to me.

彼が何者であろうと全然気にしない

I don't care at all who he is.

どんな子であろうとなるほど

Whatever kind of child they may be, I see.

— Hoje Eu Quero Voltar Sozinho (2014)

あなたの名前であろうと関係ない

It doesn't matter what your name is.

— ウィキッド ふたりの魔女 (2024)

病気であろうと健康であろうと彼女はいつも快活

Whether she's sick or healthy, she's always cheerful.

いかに粗末であろうと我が家は我が家である

No matter how humble it may be, my home is still my home.