Naming new baby after dead mother?

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Hi all,
Soon to be finding the gender of my baby and trying to come up with names. DM died very unexpectedly when I was a child. I always thought if I had a daughter I would like to name her after DM.
However not sure if it will be weird as baby will be taking my surname so would have the exact same name as my mum? Also worried it would upset my dad and his partner.

Im unsure whether to give the name as a middle name instead. Any input appreciated. :)

I know someone who went with her mum's name for her daughter but... I don't know. I personally think children should be given their own identities and that the middle spot is the place for an honour name.

We'll be using my husband's mum's name as a middle name if we have a girl.