Scottish House of Stewart (later Stuart)
The name "Stewart" is from the office of
hereditary Steward of Scotland.
The French-influenced spelling "Stuart"
was adopted temp Mary, Queen of Scots.

Tomb of Marjorie Bruce (died 1316), Paisley Abbey.
See
full size.
From
here.
Used with permission.
Walter FitzAlan,
hereditary High Steward of Scotland,
mar
Beatrix of Angus
[descendant of
David I, King of Scotland
and of
Edmund II (Ironside)
and of
Charlemagne]
and had issue:
-
Alexander Stewart,
High Steward of Scotland,
had issue:
- James Stewart, High Steward of Scotland, had issue:
- Walter Stewart, High Steward of Scotland,
mar Princess Marjorie
[dau of Robert I the Bruce, King of Scotland
and descendant of Henry I],
she died 1316,
bur Paisley Abbey,
had issue:
- Robert II, King of Scotland,
born 1316, reigned 1371-90.
- John Stewart, of Bonkyl, had issue:
- Alexander Stewart, of Bonkyl, had issue:
- John Stewart, 1st Earl of Angus, had issue:
- Thomas Stewart, 2nd Earl of Angus,
mar Margaret Sinclair
[descendant of David I, King of Scotland
and of Henry I]
and had issue:
- Margaret Stewart, Countess of Angus,
had affair with William Douglas, 1st Earl of Douglas
and had issue.
- Sir James Stewart, had issue:
- Sir Robert Stewart, had issue:
- Sir John Stewart, had issue:
- Sir James Stewart,
mar Joan Beaufort
[descendant of Edward III]
and had issue:
- John Stewart, 1st Earl of Atholl.
- Jean Stewart,
mar Sir David Bruce, 4th of Clackmannan
and had issue.
- Robert Stewart
of Durrisdeer, had issue:
- Sir David Stewart,
had issue:
- Elizabeth Stewart,
mar John Bruce, 5th of Clackmannan
and had issue.
- Isabel Stewart,
mar Sir Robert de Bruce, 2nd of Clackmannan
and had issue.
- Margaret Stewart,
mar Neil of Carrick, 2nd Earl of Carrick
and had issue:
- Marjorie of Carrick,
mar Robert Bruce
and had issue.