Maybe I'm just not seeing them, but are there any crossovers in this grid?

"17th century writers" is of course entirely inaccurate, but "writers" should at least be considered as a "completed". [People who were active in the 1700s, are considered by most of the English-speaking world to have been doing things in "the 18th century".]

They are definitely 17th century writers

https://www.thefamouspeople.com/17th-century-writers.php