Sib-set, two girls -- opinions please and help on a middle name?

Niamh Martha Bishop {pron. Neeve} + Sally ....... Bishop Sally will be the older sister by a couple of years, I as thinking Mariah as her middle but its too close to Martha for me.. Your opinions on the names please BQ : Niamh's name is not changing but I am open to suggestions for middles for Sally... show more Niamh Martha Bishop {pron. Neeve}
+ Sally ....... Bishop

Sally will be the older sister by a couple of years, I as thinking Mariah as her middle but its too close to Martha for me..
Your opinions on the names please

BQ : Niamh's name is not changing but I am open to suggestions for middles for Sally and if you know any longer names for Sally please could you suggest them too (I have no idea if there are any, but Sally stays even as a nickname)

BQ #2:
If you could suggest a middle name for Phillip O'Lachlan I would be very grateful

Thankyou :)
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