I sometimes find it troublesome that some Christians make a big deal out of the significance of names, such as the days of the week. Upon further investigation it would appear this is an American protestant trait derived from the notion that everyone in the world speaks English.

Seriously people should not get so wrapped up in the meaning of names nor their origins as God created all of the languages and is not necessarily offended by his faithful using designations created by pagans to worship their false Gods. Jerusalem is one example by all accounts, and Sunday is another one.
Regarding the Apostolic succession from a protestant point of view, this generally is focused on Constantine’s tenure or Luther’s schism.
As far as Constantine being a pagan and mixing his beliefs with those of Christianity, this is not to be denied. But to say that the Catholic Church’s association with Constantine somehow implies that the CC had disqualified itself completely ignores the Jew’s history since the time of Abraham and how God used pagans for the purpose of His will. Furthermore, there are a couple of cases in the Old Testament where pagans were loved by God. King Cyrus is an example. God call Cyrus “my shepherd” in and also “anointed” in spite of the fact that by all accounts Cyrus was a polytheistic pagan according to the Catholic Encyclopedia.
Is. 44:28
I say of Cyrus, My shepherd!
He carries out my every wish,
Saying of Jerusalem, “Let it be rebuilt,”
and of the temple, “Lay its foundations.”
Is. 45:1
Thus says the LORD to his anointed,* Cyrus,
whose right hand I grasp,
Subduing nations before him,
stripping kings of their strength,
Opening doors before him,
leaving the gates unbarred:*