which one is easier to be remembered and pronounced?

whats your name?
i paused
figuring should i ask them to call me
TAN
or
YENG
or
TONG
or
YT

and sometimes
i might pop out diff isomers for my name
when ppl ask about my name

like just now
slyvia asked me my name
i paused for like 2 secs
and then i decided to let myself known as TONG

few days ago
met aarti
she asked for my name
i said you can just call me yt

few minutes later
met her on the street
again
she asked for my name
i said
either YT or Yengtong
choose one
then she says
oh yengtong is much easier to remember!:)

my OS: er i thought yeng tong is a difficult name to most of the ppl

so now i m curious as in which isomer of my name should i be known as

PS: was wondering what type of isomer is that.stereoisomer?constitutional?
okay lets just call them diastereomer (but none of them can occur in a pair as mirror image to each other and diff to the other pair )
how about constitutional?
but they do not have the same molecular formula!
i m sure that they are isomers!but which type??
okay la i ll consider them as stereoisomers as they are diff in spatial arrangement cause they are definitely connected in the same order(tak kan ada "saya" yang mempunyai composition yang lain:P)

PPS:okay this is too biochem:P