Only by some definitions of city. By others, it is. Where I live, 100,000 residents in an urban centre is a city. Blackpool has morethan 100,000 residents.
In the UK city status is assigned, traditionally associated with the presence of a cathedral or university although less so recently, and not automatic dependant on population. Blackpool is in the UK and has not been awarded city status so isn't one. Interestingly, Blackpool did apply to become a city in 2022 but was rejected.
I'm aware, but it still feels pretty silly to not just call it a city because of arbitrary bureaucracy, when it's clearly big enough to warrant being called a city
"Phoenix Park" is not nameed after the mythical bird. Instead the name is a corruption of the Irish word "fhionnuisce," meaning clear or still water.
A note on the word "fhionnuisce," which I wouldn't even try to pronounce. My theory is that the Irish developed their own way of spelling Irish words and names ("Siobhan," "Cathal Brugha," "Taoiseach," etc.) as a way of confounding foreign invaders, primarily the English. Similar to how Stalin had thousands of incorrect maps printed and misleading street signs erected in order to confuse the Nazis during World War II.
Question 4 is a bit confusing. The Irish name for Dublin city is Baile Atha Cliath. It literally translates as town of the ford of hurdles. The term an dubh linn (lit. Blackpool) isn't commonly used in Irish to refer to Dublin.
A note on the word "fhionnuisce," which I wouldn't even try to pronounce. My theory is that the Irish developed their own way of spelling Irish words and names ("Siobhan," "Cathal Brugha," "Taoiseach," etc.) as a way of confounding foreign invaders, primarily the English. Similar to how Stalin had thousands of incorrect maps printed and misleading street signs erected in order to confuse the Nazis during World War II.