We'll search for every combination of “Sydney” and your other names.
*SYD
SS*NEY
SY*NEY
S*EEY
SY*EEY
S*EYY
SY*EYY
SY*NNY
SS*NNY
SS*NYY
SY*DNY
SY*NYY
S*YYY
SY*YYY
SS*DNY