Why a seeker changes his name after renunciation means sanyas or after initiated by a guru..
As his mantra should be friendly with his name means both should come under familiar or same category...

From this one thing can be drawn that our name surely has an impact on ous ....as otherwise why does changing name or coming under same category is an essential and must for attaining Mantra Siddhi..

...but why.....
See think words are sounds
And every name is composed of different words
Mtlb ki उच्चारण सबका...