Going by a middle name- ok or not??

Hi
My husband and I love Lydia but he hates Liddy. He says that "it's like petting a cat backwards" lol so I was think about calling Lydia by her middle name Autumn. Can't use Autumn as a first name because it's an A name and we don't reuse letters. I have nothing against Lydia as I love it, I just don't want to call her that and wanted her to have a nickname. All our kids have nicknames. 

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