Dictionary.compersonhood -- being a person; "finding her own personhood as a campus activist"
It's certainly not ungrammatical. On the contrary, its formation from person and the suffix -hood is completely unexceptional.More context would be helpful. Also, I'd add that I don't believe "personhood" is a word that high school English teachers would like very much. However, I suppose personhood would refer to the state of being human ... in an awkward, ungrammatical sort of way.
I like this definition -- it's what I had thought it would probably refer to."the fact or state of being a person <we recognize them as rights. They are the privileges of personhood -- Williard Gaylin & Marc Lappé>"
It's certainly not ungrammatical. On the contrary, its formation from person and the suffix -hood is completely unexceptional.quote]
Fair enough ... it's not technically ungrammatical. Neither would be "doghood" or "cockroachhood" by your standard of what is exceptional or unexceptional. So I'll simply maintain that it's an awkward, silly and unnecessary word. If you can read this, your personhood is a given. As for the word's likely origins, I'm not aware of them. But I'd have to agree that it likely comes from a culmination of general reactions to the much more meaningful and useful concepts of "manhood," or "womanhood."