David Stewart, Prince of Scotland, 1st Earl of Caithness

Medlands: Scotland, Kings

11. DAVID Stewart ([1356/60]–before 15 Mar 1390).
The Liber Pluscardensis names "comitem David de Strathern" as son of King Robert and his wife "regina Eufemia"[1405].
He was created Earl of Strathearn 26 Mar 1371, and Earl of Caithness before 24 Dec 1375, after which he was styled "Earl Palatine of Strathearn and Earl of Caithness"[1406].
m --- Lindsay, daughter of ALEXANDER Lindsay & his first wife Katherine Stirling.
Earl David & his wife had one child:...

Burke, "Vicissitudes of Families", p. 104-5:–

"King Robert II granted two charters to David Steward (his eldest son by his second marriage) of "castles and lands in Caithness, as well as in other parts of the kingdom, which belonged to Alexander de Arthe by hereditary succession, by reason of Matilda de Strathern, his mother, as well as the second and all other claims which Alexander de Arthe had; both on the resignation of the said Alexander." [The Bruces and the Cumyns, p. 553]

"David, Earl Palatine of Strathern, seems to have had the good fortune to escape the horrors in which so many of the members of his family were involved. The earldom of Strathern was conferred on him by his father immediately after he ascended the throne in 1371. He does not appear to have filled a prominent place in the world, and the time of his death is uncertain. He left a dau., Euphemia, who succeeded to his titles and possessions, and became Countess of Strathern."

en.Wikipedia: David Stewart, Earl of Strathearn:

David Stewart (1357 – c. 1386), Prince of Scotland, was a 14th century Scottish magnate. He was the eldest son of the second marriage of King Robert II of Scotland with Euphemia de Ross. King Robert, on March 26, 1371, the day of his coronation, is styled Earl of Strathearn, and on the following day his son David does homage to him under the title of Earl of Strathearn.[1]
On June 19 of the same year, he obtained a charter of the barony of Urquhart.[2] He received the Castle of Braal in Caithness March 21, 1375,[3] and he was also given the title Earl of Caithness between that date and December 28, 1377, when he was styled "Earl Palatine of Strathearn and Caithness".[4]
He was involved in a major dispute with his older half-brother, Alexander Stewart, Earl of Buchan, who by 1385 had occupied his castle at Urquhart. It is uncertain, but it is highly likely that he died in March 1386,[5] and no later than 1389. His wife appears to have been a daughter of Sir Alexander Lindsay of Glenesk, and sister of David Lindsay, 1st Earl of Crawford. They had issue a daughter, Euphemia, who succeeded to the earldom as Countess in her own right.

Notes

1. The Records of the Parliaments of Scotland to 1707, K.M. Brown et al eds (St Andrews, 2007-2015), A1371/1.
2. The Records of the Parliaments of Scotland to 1707, K.M. Brown et al eds (St Andrews, 2007-2015), A1371/2.
3. Exch. Rolls, iv. pp. cxvi, clix; Reg. Mag. Sig., fol. ed., 122. 137.
4. Reg. Mag. Sig., fol. ed., 150.
5. Boardman, "Stewart, David".
6. William Graham was called 'her father' in Countess Euphemia's charter of 27 January 1401. John P. Ravilious, Sir William Graham and the Countess of Strathearn, The Scottish Genealogist (September 2011), Vol. LVIII, No. 3, pp. 112-116.

References
This article incorporates text from The Scots Peerage (1904-1914), a publication now in the public domain.
1. Paul, James Balfour, The Scots Peerage, Vols. II & VIII, (Edinburgh, 1909)
2. Boardman, S. I., "Stewart, David, first earl of Strathearn and first earl of Caithness (b. in or after 1357?, d. 1386?)", Oxford Dictionary of National Biography, Oxford University Press, 2004. (Subscription Access)
3. John P. Ravilious, Sir William Graham and the Countess of Strathearn, The Scottish Genealogist (September 2011), Vol. LVIII, No. 3, pp. 112–116. (Subscription Access)