In Irish it is spelled Séamus/Séamas and it is the Irish for 'James';
in Scottish Gaelic it is spelled Seumas, also 'James'.
James is a form of Jacob ('he who takes by the heel or overreaches'
in Hebrew).
It has no meaning in Gaelic; it's not a Gaelic name.
'Robert' has no meaning in Gaelic: it is a English name.
The name Logan is of Scottish origin. It is derived from a Scottish Gaelic surname meaning "little hollow" or "small cove."
It is not a Gaelic name and has no meaning in Gaelic. In the Irish language Bible it is spelled Iárad FWIW.
The name Trina is a girls name. The name originated in Gaelic languages. In Gaelic the name Trina means- Diminutive of Catriona, a Scottish Gaelic variant of Catherine meaning meaning pure, clear
Maureen comes from the Celtic/Gaelic name, meaning "Dark".
Sheamus is his wrestling name, his real name is Stephen Farrelly/
Cassandra does not have meaning in Gaelic because it's not Gaelic. It's a name of Greek origin possibly meaning 'shining upon man'.
Despite statements that the name is of Gaelic origin, I can find no evidence that it is.The closest name in Irish Gaelic is Dáire, which means 'fruitful'.
Brianna comes from the Celtic/Gaelic name, meaning "Strong one".
The first name of Craig is American in origin. The meaning of this name is rock. The Gaelic meaning of this name is dwells at the crag.
Deidre is a Gaelic name, and has no meaning in Hebrew. Jewish People with the name Deidre usually take the Hebrew name Dina (דינה) or Devora (דבורה) because of the similar sounds.