The migration of the Dalriatans to what is now the West coast of Scotland was led by Fergus Mor MacErc, the grandson of Eochaid Muinreamhar King of Dalriata.
He and his descendants ruled both Dalriata and Dalriada. This continued until the reign of Eochaid III who was the last Dalriadan king to rule both kingdoms simultaneously.
The Dalriadan line of Descent.
Fergus Mor MacErc 500-501 Domangart MacFergus 501-507 Comgall MacDomangart 507-538 Gabhran MacDomangart 538-558 Conall MacComgall 558-574 Aedan MacGabhran 574-608 Eochaid Buide 608-629 Connad Cerr 629 Domnal Brecc the Freckled 629-642 Ferchar MacConnad 642-650 Dunchad MacConaing (Joint Rule) 650-654 Conall Crandomna (Joint Rule) 650-660 Domangart MacDomnal 660-673 Maelduin MacConall 673-688 Domnall Donn 688-695 Ferchar Fota 695-697 Eochaid Crooknose 697 Ainbcellach MacFerchar 697-698 Fiannamail MacConall 698-700 Selbach MacFerchar 700-723 Dungal MacSelbach 723-726 Eochaid MacEochaid (Last king of the joint kingdoms) 726-733 Alpin MacEochaid 733 Muiredach MacAinbcellach 733-736 Eogan MacMuiredach 736-739 Aed Find the White 739-778 Fergus MacEochaid 778-781 Eochaid the Venomous 781 Constantine MacFergus 781-820 Oengus MacFergus 820-834 Drust MacConstantine 834-837 Eoganan MacOengus 837-839 Alpin MacEochaid (The last king of only Dalriada) 839-841 Kenneth MacAlpin (The first king of a united Scotland) 841-859