The Gangani (Γαγγανοι) were a people of ancient
Ireland who are referred to in
Ptolemy's 2nd-century Geography as living in the south-west of the island, probably near the mouth of the
River Shannon, between the
Auteini to the north and the
Uellabori to the south.[1][2] There appears to have been a people of the same name in north-west
Wales, as Ptolemy calls the
Llŷn Peninsula the "promontory of the Gangani" (Γαγγανὤν ἄκρον).[3][4]
See also
Conganchnes mac Dedad, a name of perhaps some relation.
Cú Roí, Conganchnes' nephew, was based in Irish legend not far from the Gangani.