TweedleTam or TweedleTom

For those of you who don't know, Tom and I are expecting a baby the first week of October. We'd like to share the good news with everyone that we just found out it's a boy! Do not ask on the name, that is TBA. However, if you'd like to add any suggestions, here are a few I received from my preschoolers: Alvin (after Alvin and the Chipmunks), Optimus Prime (from Transformers), or Captain Underpants. I included a few ultrasound pictures. The one on the left: announcing it's a boy (enough said). The one on the right: the baby looking right at you, fingers tucked under the chin and a big round belly. I kind of think the eyes look like C3PO.

-Tami