Help! After the fact name change! Without offending anyone.

So, I named my daughter Poppy Wren. But then my dad said he really wished I had given her a middle name after his mom, Tema (or Tamar in Hebrew). I agreed that I wish I had. I'm going to change it, but I feel sad just letting go of Wren. My step dad, who has no kids, liked that name a lot. Otoh, it might make Tamar stand out less if Poppy has two middle names, dishonoring my grandmother. What should I do?!?!?! Poppy-Wren Tamar? Poppy Tamar Wren or Poppy Wren Tamar? Or, just Poppy Tamar? Help!