Disclaimer: I don't own Hellsing, though I wish I did. The only character I can possibly lay claim to is Michael Anderson.
They were not allowed to name the fetuses. They were referred to by their numbers, all the way up to 136. Emotional attachment would hinder the experiment's progress, especially when it was clear most of them would not be successful. One-hundred had to be aborted while still in the artificial womb. Another thirty-five died naturally after "birth", or were killed quickly and painlessly under general anaesthesia.
Still, when 136 began to make his first attempts at speech, it was clear that they had to at least consider a name for him.
The surname was obvious; Anderson, after the priest who had begun the project five years ago. His given name was more difficult. Someone suggested Michael, but to take his name entirely from his surrogate "father" seemed too extreme, and Anderson refused. A few of the other archangel names were considered, and Anderson proposed Gabriel, eventually dismissing the name for being entwined in Islam as the dictator of the Koran. It was not until Anderson finally held his creation in his arms that the instrument of God was given a name.
It was an odd sight, the priest who had killed so many on the battlefield cradling an infant in his arms as though it were his own. There was a long silence; neither the baby nor the man made a sound.
"Alexander," Anderson muttered after several minutes.
"Excuse me, sir?" said the Sister nearest him.
"We shall call him Alexander," Anderson replied, leaving no room for any argument. "Alexander the Great, for he will conquer heresy and sin throughout the world and build for us a new empire." He handed the newly-christened Alexander to the nun and removed his glasses. "It's time to begin the sensitizing process."