Virgil van Dijk claims he knows nothing of interest from English clubs and is keen to prove himself in the Champions League with Celtic.
QPR loanee Tom Carroll wants to "make it at Tottenham" but is prepared to consider all of his options at the end of the season.
Kelly, 19, has been a regular member of the U20 squad and has featured on the bench for the first team on a number of occasions, although he has yet to make his senior debut.
He made 10 appearances for East Stirling during a loan spell in the first half of last season.
Naismith, 18, whose deal will keep him at the club until at least the summer of 2014, has made two substitute appearances in the Clydesdale Bank Premier League.
He was loaned out to Morton and Cowdenbeath last season and played 11 matches.