One way to implement your example is using an enum and token pasting, like this
enum {
Bob1 = 45,
Bob2 = 8758,
Bob3 = 436,
Alice_first = 9224,
Alice_last = 3510
};
#define LABEL( a, b ) ( a ## b )
int main()
{
doSomething( LABEL(Bob,1) );
doSomething( LABEL(Bob,2) );
doSomething( LABEL(Bob,3) );
}
void checkName()
{
doFirstToLast( LABEL(Alice,_first), LABEL(Alice,_last) );
}
Whether or not this is best depends on where the names come from.
If you need to support the for loop use-case, then consider
int bob[] = { 0, Bob1, Bob2, Bob3 }; // Values from the enum
int main()
{
for( int i = 1; i <= 3; i++ ) {
doSomething( bob[i] );
}
}