Question: The Lemlair House was originally built as a fortified seat for the chief of this, which also held the Foulis Castle from the twelfth century?

Context paragraphs:
Lemlair House: Lemlair House was originally built as a fortified seat for the chief of the Clan Munro in 1643.  However it soon became the home of Colonel John Munro of Lemlair, a near relative of the chief.  Lemlair is situated halfway north of Dingwall and south of Evanton, and is just a short distance from Foulis Castle.  The name "Lemlair" is thought to come from the Gaelic for "a bare place suitable for grazing horses".

Lubart's Castle: Lutsk High Castle, also known as Lubart's Castle, began its life in the mid-14th century as the fortified seat of Gediminas' son Liubartas (Lubart), the last ruler of united Galicia-Volhynia.  It is the most prominent landmark of Lutsk, Ukraine and as such appears on the 200 hryvnia bill.  Another city castle, built by the Czartoryski family starting from the 14th century, is now a ruin.

Liahavichy Castle: Liachavičy Castle was a fortified Belarus castle.  It was one of the most significant castles in Belarus in the 17th century.  It may have been in existence as a hill fort since the eleventh or twelfth century.

Hector Munro, 17th Baron of Foulis: Hector Munro, 17th Baron of Foulis (died 1603), also known as the "master of Foulis", was chief of the Highland, Scottish clan, Clan Munro.  He is the 10th chief of Clan Munro who can be proved by contemporary evidence.  He was seated at Foulis Castle.

Robert Munro, 14th Baron of Foulis: Robert Munro, 14th Baron of Foulis (died 8 September 1547) was a Scottish soldier and clan chief of the Highland Clan Munro.  He was seated at Foulis Castle.  Although he is traditionally the 14th Baron and 17th overall chief of the clan, he is only the 7th Munro chief that can be proved by contemporary evidence.

Foulis Castle: Foulis Castle is situated five miles south-west of Alness in Ross and Cromarty, Scotland.  It is a white washed mansion that incorporates an old tower house with gun loops.  The castle was held by the Clan Munro from the twelfth century or earlier and they had a stronghold there.

Hugh Munro, 9th Baron of Foulis: Hugh Munro, 9th Baron of Foulis was a 14th – 15th century Scottish soldier and said to be 12th chief of the Clan Munro in the Scottish Highlands.  Hugh was seated at Foulis Castle in Ross-shire, Scotland.  Although Hugh is traditionally the 9th Baron and 12th overall chief of the clan, he is only the 2nd Munro chief that can be proved by contemporary evidence.

John Munro of Lemlair: John Munro, 2nd of Lemlair (fl.  mid 17th century) was a Scottish soldier who fought as a Colonel in the Wars of the Three Kingdoms.  His seat was at Lemlair House.

Fortified houses in Ireland: In Ireland at the end of the sixteenth and beginning of the seventeenth century, the Fortified House, along with the stronghouse, developed as a replacement for the tower house.  'Fortified Houses' were often rectangular, or sometimes U or L-shaped, three-storey structures with high gables and chimney stacks and large windows with hood mouldings.  Some examples have square towers at the corners.  The interiors were relatively spacious with wooden partitions and numerous fireplaces.  In a number of cases 'Fortified Houses' were built onto pre-existing tower houses.  'Fortified Houses' were protected by gun fire from the angle towers and bartizans, and were also provided with bawn walls with gunloops, towers and protected gateways.  'Fortified Houses' were built throughout Ireland by large landowners from a variety of backgrounds, such as the Old English Earl of Clanricarde who built Portumna Castle in County Galway; Gaelic lords such as MacDonogh MacCarthy, Lord of Duhallow, who built Kanturk Castle in County Cork; and Cromwellian soldiers such as Sir Charles Coote, who built Rush Hall in County Offaly.

George Munro, 10th Baron of Foulis: George Munro of Foulis is traditionally the 10th Baron and 13th successive chief of the Clan Munro.  However he is only the third successive chief of the clan who can be proved by contemporary evidence.  He was the eldest son of Hugh Munro, 9th Baron of Foulis and was seated at Foulis Castle.

Supporting paragraphs: Lemlair House Foulis Castle
Answer: Clan Munro