Hi, noticed your post re Morrisons who emigrated to Nova Scotia around 1800. Not sure if this will help but it may give you a starting point. As you are probably aware the name Morrison has several origins, some of which are connected, others appear to be from a different lineage. Morrison is a well known surname in the Outer Hebrides with their stronghold being in Harris/Lewis consisting of two related families springing from the same origin, hence the two different clan mottos.
Teaghlach Phabbay (Pabbay) which means the family from Phabbay, Phabbay is a small island (now uninhabited) bewtween the islands of Harris and North Uist. Dun Eistein is the name of a fort associated with the Morrisons at the Butt of Lewis. Despite their names Harris and Lewis are not two seperate islands but are in fact one island, the south being Harris and the north Lewis. The Morrisons of Harris and Lewis are Protestant whilst the Morrisons of Barra, North Uist and South Uist are predominately Catholic. Despite the religious differences I think it is safe to assume given their Gaelic speaking heritage, their remoteness from the mainland of Scotland and the fact the family name originates from Phabbay which sits between North Uist and Harris, that the Morrisons of the Outer Hebrides or Western Isles all come from the same stock. My own family originates from Scalpay which is a small isle of the coast of Harris, my father lived their for part of his childhood and is a native Gaelic speaker. His father was a Protestant minister married to a Campbell. Given what you know of your family I would guess that if they originate from the Hebrides (Their forenames are commonplace amongst Gaelic speakers) and being Catholic then they probably originate from Southernmost of the Outer Hebrides, such as Barra and North and South Uist where their are many Morrisons. Not sure what records the Catholic church there would keep but it may be a good starting point. (This doesn't preclude your origins coming from elsewhere...Northern Ireland, both Catholic and Protestant Morrisons, and the south of Ireland). The period you mention of the 1800's is interesting in that it sits in the middle of the the Highland Clearances when many Landowners either moved their tentants to the coast or kicked them off the land completely to make way for more profitable sheep! Whist the greatest effect was felt on the Highland mainland it also reached the outer islands when many of the 'crofters' were evicted or their lives made so intolerable they were forced to move on. During this period many were forced to or chose emigration as a means of survival. The following links may be useful http://www.scotlandsfamily.com/index.htm
this includes links to ships that sailed from Scotland to Canada in the late 17th and early 19th Century, and http://www.virtualhebrides.com/index.htm
this covers both modern and historical Hebridean information.
Hope this was not too longwinded and might be of some assistance. Welcome to the Clan.