There is no Ron Grigsby but there is a Ron Weasley
they are the same people
Arthur Weasley
Arthur Weasley.
Harry Potter and Ron Weasley does not kiss in any of the seven Harry Potter books. However, Harry Potter kisses Ginny Weasley, "Harry Potter" kisses "Hermione Granger" (when the piece of Voldemort's soul in Slytherin's locket is tempting Ron Weasley), and Ron Weasley and Hermione Granger kiss. In the movies so far (Harry Potter and the Half-Blood Prince having just been released), Harry Potter has kissed Cho Chang and Ginny Weasley, while Ron Weasley has kissed Lavender Brown. If you want Harry Potter and Ron Weasley to kiss, may I suggest reading fanfiction? Although, in most fanfiction pairing those two they do a lot more than just kissing...
The Slytherin-related horcrux was Salazar Slytherin's locket, which Ron Weasley destroyed using the Sword of Gryffindor.
Ron Weasley stabbed it with the sword of Godric Gryffindor.
Yes, they are brother and sister.
No
Ron Weasley was created in 1997.
Ron Weasley
Harry never tell this to any of them, just his son, in the Deathly Hallows's epilogue.
Ron Weasley. They have two kids named Rose and Hugo Weasley.
Ron Weasley's owl is named Pigwidgeon, or Pig for short.
Ron Weasley was the youngest son and sixth of seven children of Molly and Arthur Weasley
Sorry, but Ron Weasley is fictional.
There is no Ron Grigsby but there is a Ron Weasley