'Nah' doesn't appear to be Gaelic.
The Scots Gaelic word for 'follow' is 'lean' 'leantainn'.
Caitlin is an Irish Gaelic loan name in Italian.Specifically, the name is a feminine proper noun. Its original meaning in Irish Gaelic is "pure." Its equivalent in Italian is Caterina.The pronunciation is "keh-tleen" in terms of the Irish Gaelic loan word and "KAH-the-REE-nah" in terms of the Italian equivalent.
It has no meaning: it's not a Gaelic word.
It has no meaning in Gaelic; it's not a Gaelic name.
Taylor is not a Gaelic word and has no meaning in Gaelic.
In Scottish Gaelic: fantastachd In Irish it's "fantaisíocht"
The word 'bassett' is not a Gaelic word, and therefore has no meaning in Gaelic.
"Colin" isn't a Gaelic word and therefore doesn't have a meaning in Gaelic.
Cassandra does not have meaning in Gaelic because it's not Gaelic. It's a name of Greek origin possibly meaning 'shining upon man'.
Lexiology.com Dictionary http://www.lexiology.com/meaning/gaelic
'Heath' is an English word with no meaning in Gaelic.
The word 'luck' is in English not Irish Gaelic.