Shirabe
誰 に も

誰だれ

Common pronoun
English jmdict
1
pronoun who
だあれ is emphatic or inquisitive
あそこに立ってる女の人はだれですか。
Who is the woman standing there?

誰にもだれにも

Common Expression
English jmdict
1
expressions (phrases to anyone;to everyone
それは秘密です。誰にももらすことがあってはいけません。
It's a secret; don't give it away to anyone.
2
expressions (phrases by anyone;by everyone
ホームズは誰にも気付かれずに部屋から出ていった。
Holmes went out of the room without being noticed by anyone.
3
expressions (phrases in everyone;in anyone
誰にも知的な願いがある。
Everyone has his intellectual desire.