article_title name title successor
john mór tanister
 john mór tanister macdonald clan chief : macdonald of dunnyveg domhnall ballach
john mór tanister

john mór tanister -lrb- or `` iain macdhòmhnaill '' , died 1427 -rrb- was the second son of john macdonald -lrb- john of islay , lord of the isles -rrb- and princess margaret stewart of scotland , daughter of king robert ii .
he is the founder of clan macdonald of dunnyveg .
he was granted 120 merklands in kintyre , with the castles of dunaverty , skipness and airds and 60 merklands on islay with the castle of dunyvaig upon his father 's death .
not being satisfied with his inheritance , he led a revolt against his brother dómhnall Íle as john was recognized as the heir-apparent -lrb- tànaiste -rrb- .
the rebellion started in 1387 and went on into the 1390s , and john obtained the support of the powerful clan maclean kindred .
however , john and the macleans were eventually forced to submit to dómhnall , and by 1395 john mór had been forced to flee into ireland .
there he entered the service of king richard ii of england in antrim and later king henry iv .
through his marriage with margaret bisset , a daughter of the maceoin bisset , lord of the glens , according to macdonald shanachies he received as the dowry the glens and rathlin island in ireland , then becoming known as lord of dunnyvaig and the glens .
in fact this is a later invention , for the maceoin bissets continued to hold the glens of antrim until at least as late as 1522 , when the last known died in battle .
he led the reserve at the battle of harlaw just north of inverurie in aberdeenshire on 24 july 1411 and later fought with robert stewart , regent albany who had forayed into argyll to force his brother dómhnall Íle to surrender .
john mor was attacked and killed by james campbell after a scheduled meeting at ard-du , islay in 1427 .
