J-PF5456 formed 3500ybp and its TMRCA is 3300ybp (according to YFull), so pre-Roman.

Question 1: My grandpa was haplogroup J-PF5456, he was born and raised in the Netherlands, so his ancestors (and therefore mine) likely arrived with the Romans?

Question 2: Is J-PF5456 Tuscan?

Question 3: Could J-PF5456 be Etruscan?