to each their own; people differ; everyone is different
A set phrase acknowledging that preferences, opinions, or circumstances vary from person to person. Often used to accept differences without judgment.
Tastes differ from person to person.
What people value is different for everyone.
Standard kanji-kana mixed spelling.
Rare kanji spelling using 其々 for それぞれ.
Rare kanji spelling using 夫々 for それぞれ.
Compound of 人 (person) and それぞれ (each, respectively). The phrase is a straightforward combination with no unusual historical derivation.