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もあろう

there may be; of all

→ も
phrase Rare #39,304
there may be; of all A formal or literary expression. In ともあろうものが／者が, it means “someone of that status should...” and expresses surprise or criticism. In 所もあろうに, it means “of all places,” while 日もあろう means “there may be a day.”
JA: 専門家ともあろう人が、そんな間違いをするとは驚きだ。
EN: It's surprising that someone who is an expert would make such a mistake.

所もあろうにモンゴルで偶然彼女に出会った。

Of all places, I happened to run into her in Mongolia.

大学の教授ともあろうものが、なぜ殺人事件を起こしたのだろうか。

Why would a university professor of all people commit murder?

彼らもいつか幸福になる日もあろう。

Someday, they too may find happiness.