I may wait a bit, but I have a couple in mind for my first infant.
I was doing a million simleons challenge with a female Sim, who married Clement Frost (father winter), and they had a daughter together. I aged her to a child, and my female Sim is currently expecting her second child with Clement. I will hold off playing them at the moment.
They will be the first couple to welcome a new infant into the game.
My female Sim is named Luna Moon, and their daughter is named Emma MoonFrost. If they have a son it will be Jack MoonFrost.