Whether this Alpín has any connection to the "Elffin son of Crup" who the Annals of Ulster say was besieged in 742, by whom is not said, is not known. Likewise, whether there is any connection between this Alpín and the Alpín mac Echdach who may have ruled in Dál Riata in the 730s is also unknown.
It is uncertain if this Alpín shares a link with the "Elffin son of Crup," who was reportedly besieged by an unidentified force in 742, as stated in the Annals of Ulster. Likewise, there is no information available regarding whether this Alpín might be connected to the Alpín mac Echdach, who may have ruled Dál Riata during the 730s.