Originally, toll calls were relayed by voice from operator to another until they reached the local operator in the desired city. The local operator was familiar with local exchanges, even if they had an unusual pronoumciation or spelling.
When operators could dial toll calls themselves (and later subscribers), confusing names caused problems. During the 1950s the Bell System renamed many local exchanges for that reason and used a standardized list.
For instance, outside Phila there was a town and exchange "Cynwyd". It was pronounced "Kinwood". Obviously in dialing a name like that would cause problems. It was changed.
My question: In Phila itself (West Phila), there was an exchange, BAring 2 (still in use today as 215-222). But it was pronounced BEARING, as in teddy-bear. I would think a name would like would case lots of problems. Would anyone know why that name was not changed?
Also, the Bell System used many names with potential confusion, such as HYatt and HYacinth, which could be easily dialed as HI instead of HY. Using "Y" (9) as a vowel could be confusing but coming up with names for n9x wasn't too easy. (CYpress, EXport, HYatt, LYric, OWen, SYosset/SWinburne, TYler, WYmouth.)