Sentience in humans begins at 4 years old (mental age). I don't consider humans younger than that to be people. I also firmly believe that you have to have some form of consciousness, self identity, and clear cognition to count as a person.
A human corpse is not a person, a brain-dead patient is not a person, and a human with severe mental disorder should not be held to the same standards as other people.
Similarly, anything that does have sentience is clearly also a person, and should be treated as such. Animals such as crows, parrots, octopi, dolphins, whales, and some monkeys and apes are demonstrably as or more intelligent than some human children. They should not be treated the way they are.
As a side note, I agree with that other guy. Polycules should be allowed to marry.
Also, names in this day and age are useless, at least official ones. We have computers, we already use government issued ID for everything, having a name just makes things confusing. Just use nicknames, either created by the person or by agreement from peers and allowed by the person. The concept of a parent forcing a name on their child is archaic and cruel.
And finally, real life security is horrifying. I expected things to be like in the movies, where you need a special skill or training to do those spy shit. But no. In comparison to real life, Google actually has good security and privacy. WTF people? Everytime I receive mail with my name and a description of what's inside just written on the box I cringe and go back to lurking online again.