Assume you have Old Nan and Jeyne Westerling on the board and Eddard in your deck.
Old Nan's text : Kneel Old Nan to choose a character. Until the end of the phase that character gains or loses a trait of your choice.
Jeyne Westerling's text.. Kneel Jeyne Westerling to search your deck for a King character, reveal it, and put it into your hand.
So since Old Nan does not say choose a character in play.. could I do something like
Kneel Old Nan.. and say.. I give Eddard the King trait.
Then kneel Jeyne and search for Eddard?