それぞれ
それぞれ · sorezore · JLPT N3 · adverb
each
それ + それ = that + that: this one, that one, each one in turn
Written 其れ其れ, it is just それ (that) said twice, with the second そ softened to ぞ. Pointing at one thing after another, saying that, that, gives you each one, or respectively.