While the extreme right wing (ERW) has not gained a foothold in local or national Irish politics, the country has witnessed a growth in online activism and harassment, and physical protest and violence. This paper explores a case study based on 4876 unique posts from one Irish-based Telegram group active during six months of the COVID-19 pandemic. The main findings are that: (a) this group was heavily influenced by foreign content and influencers, in particular, American ERW content and conspiracies associated with QAnon; (b) conspiracy theories were not adopted wholesale but adapted for an Irish audience; (c) Irish actors were not passive receivers of US content, and multi-directional exchanges of ideas were witnessed. While generalising beyond the case study analysed in this paper would require further data, this may suggest that Irish influencers are part of a transnational online ecosystem in which ideas and theories are shared and adapted to local contexts. These findings offer insights into the ERW in Ireland and, more generally, how the ERW communicates and spread conspiracy theories across national borders.