When I was 15 my mam applied to get my name changed by deed pole (change the spelling of my first name, totally change my middle names, and totally change my last name). I hadn't seen my dad since I was 11, but he still sent a bit of maintenance for me, and birthday cards, and I got the occasional phone call (VERY occasional).
Anyway, they said that he could contest it if he didn't want me to change it as I was under 18.....
so they wrote to him, and he wrote back saying that he strongly contested it.
But my mam argued the point that I was being bullied at school because of my surname, so anyway it went to court but my dad didn't show up...however he sent another letter to be read out in court stating reasons why he didn't want me to have it changed (I wasn't there so I dunno what it said, my mam went on my behalf).
AAAnyway, the judge ended up letting me change my surname (on account of the bullying, and also the fact that my dad hadn't bothered turning up) but didn't allow me to change any of my other names.
I'm really glad my other names weren't changed now - at the time I was only getting them changed because my mam was into numerology-type-thing and was convinced that my name was unlucky because the numbers in it didn't add up (some rubbish like that

)
I have a good relationship with my dad now....we started seeing each other again when I was 17 and I now see him roughly every 2 weeks. I wish my surname hadn't been changed aswell but it doesn't really matter now as I have DH's surname.