Personally I would have the two stones that are the same color as far away from eachother at different ends of the sequence
On mine I have my partner and I on the outer ones, helps as we’re both November, and then in the middle both my children’s
I would most likely do birth order. My husband and I have the same birth stone and I’ve started a pandora bracelet since my daughter was born and will most likely either only get one emerald or 2 and put them on opposite ends
I like @Frayere idea and that you you can still separate them a bit if you want
I feel like I would do me, husband, son, baby, dog