Parishes and towns

Hi Cyn,
County Cork......Kanturk (Parish and place) Domtariff is a townland.
see the map...
Domtariff cork - Bing Maps

If you know the approx ages when they went ti Brisbane work out their Baprism years and this is where you would look. At that time you were usualy Baptised within three days of your birth. May even happen now.
Catholic Parish Registers at the NLI
This is the Kantruk file
Kanturk, Cloyne - Catholic Parish Registers at the NLI
You will see two red areas, looks like the Parish is split. If you cannot find the Baptisms there, you would need to look at the other Parishes next to Kanturk.
From here you would need to know the Fathers name.
I have checked the Tithe records and only two Brosnan's listed these were north of Kanturk nearer to County Limerick.

Did they go on a ship called Ancilla?
I have seen a Timothy and a John, no Benjamin listed.

Margot

Actually, I think that your family info may have become slightly confused at some point, but I may be able to explain why, and possibly point you to the townland where your ancestors lived.  I have a great-grandmother who grew up in the Catholic parish of Dromtarriffe, so I am somewhat familiar with the place names in the area, although I've never been there (I live in the US and have visited Ireland a number of times, but have never made it to Cork).  First, a bit of explanation is needed:

Dromtarriff (with no "e" at the end) is the name of a civil parish in Cork.  The civil parishes are now basically administrative districts, though they have their origin in the arrangement of Church of Ireland parishes.  That civil parish is itself located in the larger Catholic parish of Dromtarriffe (spelled with the "e").  Catholic parishes are often larger, and may contain parts or all of several civil parishes. Sometimes they bear the name of one of those civil parishes, and sometimes they have completely different names.  The history of all that is probably more than you want at this point, however.

Within each civil parish is a number of townlands, sometimes just a dozen or so, but sometimes many more.  These are the smallest official districts, and are still used as addresses in many cases, since people in rural areas usually lack street addresses.  The Irish government has been trying to change this, but most people still use townland names when describing a rural location.  In some places the local people have names for smaller areas within a townland, often referred to as "sub-townlands".  These may just be local usage, but sometimes they may once have been "official" townlands, so the name may appear in older records, but no longer be searchable in later records (the names and boundaries of some townlands have been changed over time).

Adding to the confusion is the fact that, when civil records of births, marriages, and deaths began in the 1860's (a bit earlier in some cases), they were recorded not by civil parish or Catholic parish boundaries, but by larger registration districts which included a number of civil parishes (and usually several Catholic parishes), named after one of the larger towns in the area.  This has misled people into recording the wrong place names for the births of some of their ancestors, especially for births from the 1860's onward, since the official record will record the place of birth using the name of the town which is the center of the registration district, and may not mention the actual parish or townland where the person was born (though sometimes it does give that info).

So, to get to the specifics:  the town of Kanturk is not located in the civil parish of Dromtarriffe, though it is only a few miles away.  Kanturk is, however the name of the registration district for civil records (used from the 1860's onwards).  An example from my own family can illustrate how this works.  My great-grandmother left Ireland before civil records were created, but she had a sister who stayed, and that sister had one of her children after the civil records started.  He (Jeremiah Fitzpatrick) was born in 1866, and the "Event Location" (his place of birth) was recorded in the civil registry as "Dromtarriff, Kanturk, County Cork, Ireland".  Parsing this out, it means that he was born in the civil parish of Dromtarriff, in the registration district of Kanturk.  As I said, sometimes the civil parish is not given, but his record is even more helpful than some are, because it also records that the "Event Location (Original)" was "Knockaman Drumtariff, Kanturk".  Ignoring the spelling discrepancies (common in older Irish records), this indicates that he was born in the townland of Knockaman, in the civil parish of Dromtarriff, in the registration district of Kanturk.  There is no townland of that name in Dromtarriff (or anywhere else in Cork, for that matter), but there is a Knockmanagh, which may be the correct place, because it is very near where my great-grandmother grew up.

So, in your case, I think you can safely assume that Dromtarriff is the civil parish you want, and you can see more info about it here:  https://www.townlands.ie/cork/dromtarriff/

At that site you can see a list of the townlands in the parish, but there is no "Coolelaugh" listed.  However, there is a Coolclogh (in Irish, Cúil Chloch, possibly meaning "stony nook").  I mentioned the frequent variance in spelling of words in Irish place names, especially when they were being transcribed by someone unfamiliar with Irish, and “-laugh” and “-logh” as endings would be obvious variants. I'd also be willing to bet that someone misread the second "c" in Coolclogh as an "e" at some point, especially if they were reading old handwriting.

So, the townland in which your ancestors lived may be Coolclogh, about which you can find more info here:

https://www.townlands.ie/cork/duhallow/dromtarriff/coolclogh/coolclogh/

The pages at that site contain links to the 1901 and 1911 censuses, as well as the census-like (mid-1850’s) Griffith’s Valuation, but the links are not working for Coolclogh.  That’s also true for a number of other townlands in the area (including the one where my great-grandmother grew up), which is probably due to either name changes having occurred or alternate spellings not being accommodated by the sources.

The Catholic parish of Dromtarriffe has baptismal and marriage records back to 1832, so you ought to be able to find records for your family there, whether or not they lived in Coolclogh.  You can access those records here:  https://registers.nli.ie/parishes/0047

At all of the sites listed above, there are interactive maps which you can use to see where nearby places are located.  Also, in case you’re interested, the name Dromtarriff[e] comes from the Irish Drom Tarbh, meaning "bull ridge", and may refer to an ancient pagan ceremony where a bull calf was sacrificed on May 6th near a holy well which is still located in the parish.

In looking up this info for you, I learned that my great-grandmother grew up very close to Coolclogh.  In fact, her home townland, Garranbaun, is separated from Coolclogh by just one other townland, Knockardrahan.  Garranbaun is in a separate civil parish from Coolclogh (called Kilmeen), but is in the same Catholic parish.  If you’ve done DNA testing, we might even check for a connection, though I don’t know of any Brosnan’s in my family.