How old must a child be befor it's to late to change their last name?

My ex husband wanted nothing to do with our son until he was 13 months old, now that he is 19 months old he wants his last name changed to his. I feel like he should have my last name since ive been there since the beginning. If this were to go to court do you think the judge would grant him that?How old must a child be befor it's to late to change their last name?Once a child's name is on the BC, both parents are usually required to consent before a name change will be allowed. As long as you don't consent to it, your son's name won't be changed. If your ex tries to contest it, the fact that he abandoned his son for the first 13 months will not reflect well on him.
How old must a child be befor it's to late to change their last name?
No, the judge wouldn't grant this! They would have to have your permission before he could do this.