The word 'luck' is in English not Irish Gaelic.
It has no meaning: it's not a Gaelic word.
Scottish Gaelic: Beir buaidh! (best of luck, I hope you succeed!)Irish Gaelic: Go n-éirí go geal leis. (The best of luck to him.)
It has no meaning in Gaelic; it's not a Gaelic name.
Taylor is not a Gaelic word and has no meaning in Gaelic.
àgh
adh ( with a fada on the 'a')
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.
'Nah' doesn't appear to be Gaelic.