I'm pretty sure it was never a name change, this guy is fairly, well, obvious with his alts' names - his main is Bassi, then he has Bassitwo, Bassithree, Bassifour etc

As he's been using that system for ages I find it pretty unlikely that that character only acquired its name at lvl 61... in fact I'm fairly sure I remember seeing it at lvl 60 anyway, a couple of months before its first recorded date on the profile - I met him in HH inn when my priest was levelling, so that must have been around mid February.