It has been a long-running debate in Wales, with comedian Tudur Owen describing how "history is lost when place names are changed".
He gave the example of Cable Bay on Anglesey - allegedly named in English because someone laid a cable there.
"Except of course it's not. It never was Cable Bay. It is Porth Trecastell," he said. "Porth translates as access point or gateway for travel, trade and fishing.
"Trecastell suggests an ancient fort or castle that would have defended this stretch of the coastline."
The Welsh Language Commissioner produced a list of 3,000 place names - and this showed that some Anglicised names had disappeared, such as Llanelly, with it reverting back to Llanelli.
The Petitions Committee was set up to consider all petitions submitted by the public, with those gaining more 5,000 signatures being debated.