More personalization ideas:
The date is too big - but something smaller - birthrates or maybe the latitude and longitude of the hospital you were all born in?

Something in all of our Handwriting?

I like the thumbprint idea too.

The Lord of the Rings Guys all got a tattoo - elvish for "nine" because there were nine members of the brother hood. Samwise has his on his ankle




Group Ideas - I really like the numbers 1 of 1

Similar but not identical





Or identical - if we each contribute to part of it
When the continue from one person to another - with the quotes on two arms of the same person - we could break them up to four pieces



Or just really teeny tiny ones (but not in white and not on fingers)
