Earl of Lennox
The Mormaer of Lennox or Earl of Lennox was the ruler of the long-lasting provincial Mormaerdom/Earldom of Lennox in the Medieval Kingdom of the Scots. The first Mormaer is usually regarded as Ailin I (also Alpin, Alun or Alwin), but the genealogy of the Mormaers gives earlier names. The last Mormaer of the native line was Isabella, who married Muireadhach Stewart, the Duke of Albany, and died in 1458.
The recent work of Cynthia Neville and Michael Brown has made Lennox perhaps the best understood native scottish Mormaerdom.
After the extinction of the Lennox line, the Scottish Peerage title of Earl of Lennox was granted to John Stewart, Lord Darnley. It has been "created" six times, becoming extinct every time. The Earl of Lennox was elevated to Duke of Lennox in 1581.  or here 
Earls of Lennox, Second Creation (1488)
|C.o.A. for the Stewarts of Lennox.|
- John Stewart, 1st Earl of Lennox, Lord Darnley (d. 1495)
- Matthew Stewart, 2nd Earl of Lennox (1488–Battle of Flodden Field, 1513)
- John Stewart, 3rd Earl of Lennox (d. 1526)
- Matthew Stewart, 4th Earl of Lennox (1516–1571)
- Henry Stuart, Lord Darnley (1545–1567), heir to the earldom but predeceased his father; husband to Mary, Queen of Scots and father of James VI of Scotland
- The title merged with the crown in James VI of Scotland, grandson of the 4th Earl.
Earls of Lennox, Third Creation (c. 1571)
- Charles Stuart, 1st Earl of Lennox (1555–1576), second son of the 4th Earl of the second creation
- Lady Arbella Stuart, 2nd Countess of Lennox (1575–1615) (over-ridden)
Earls of Lennox, Fourth Creation (1578)
- Robert Stewart, 1st Earl of Lennox, "exchanged" for Earldom of March 1580, second son of the 3rd Earl of the second creation
Earls of Lennox, Fifth Creation (1580)
- with subsidiary Lord Darnley, Aubigny and Dalkeith (1580)
- Esmé Stewart, 1st Earl of Lennox (1542–1583), grandson of the 3rd Earl of the second creation through his third son John