Bristol Palin has not changed son Tripp's name from Johnston to Palin
E! News reports that Tripp Johnston is still Tripp Johnston, citing an Alaska court official who's confirmed that no legal petition to change his name has been filed.
Talk of a possible name change started after Bristol allegedly took to her private Facebook page, simply posting "Tripp Easton Mitchell Palin...PALIN!!!"
Should this sentiment ever prompt her to take action, she'll have to get Johnston's permission.
Good luck with that.