Colban became earl of Buchan jure uxoris (in right of his wife) by marrying the heiress, Eva.

Mentioned in the Notes to the "Book of Deer": http://www.ucc.ie/celt/online/G102007/

VI

Colbán, mormaer of Buchan, and Éva, daughter of Garnait his wedded wife, and Donnchad son of Síthech, toísech of Clann Morgainn, quenched all the grants from all imposts, in favour of God and of Drostán and of Columba and of Peter the apostle, in return for the dues on four davochs'-worth of that which should devolve on the chief religious houses of Scotland in general and on its chief churches. These being the witnesses: Bróiccín, and Cormac abbot of Turriff, and Morgann son of Donnchad, and Gille-Petair son of Donnchad, and Mal-Fhéichín, and the two sons of Maitne, and all the good men of Buchan in witness of it, at Ellon.

Colbán, Earl of Buchan From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Colb%C3%A1n,_Earl_of_Buchan

Colbán of Buchan is the second Mormaer of Buchan to be known by name as Mormaer.

Colbán was not the son of his predecessor Gartnait. It is possible that Colbán came from another Buchan family, or even, as some have suggested, Fife. He perhaps obtained Buchan by marrying the daughter of Gartnait, whose name is recorded as Éva. He had a son named Magnus, and another called Merleswain, who became known as Merleswain of Kennoway. Colbán was in the Scottish army that invaded England with King William I of Scotland, 1174.

Bibliography

Roberts, John L., Lost Kingdoms: Celtic Scotland in the Middle Ages, (Edinburgh, 1997), pp. 49-50 Young, Alan, "Buchan in the 13th century" in Alexander Grant & Keith J. Stringer (eds.) Medieval Scotland: Crown, Lordship and Community Essays Presented to G.W.S Barrow, (Edinburgh, 1993)

Mormaer of Buchan

fl. 1174
Preceded by Gartnait Succeeded by Fergus

He was also called Colbán.

Colban was in the Scottish army that invaded England with King William I of Scotland in 1174.

See "My Lines"

( http://homepages.rootsweb.ancestry.com/~cousin/html/p228.htm#i26267 )

from Compiler: R. B. Stewart, Evans, GA

( http://homepages.rootsweb.ancestry.com/~cousin/html/index.htm )