An interesting petition, dated 1723, in the _Calendar of Treasury Papers_, caught my eye:
"Memorial of the Hon[ble] M[rs] Patricia Ballentyne to the Right Hon[ble] the Lords of the Treasury, recommended by the Duke of Devonshire." Is the only descendant, alive, of Patrick, Earl of Forth and Brantford [sic, Brentford], who was General under Gustavus Adolphus in Sweden, and under King Charles the 1st during the Civil Wars, and who performed his duties with universal approbation, and expended of his own money above 10,000 l. in that King's service; of which memorialist, who is his next heir, has never recovered anything. "Lady Jean Ruthven, his only daughter, when she belonged to the late Princess Sophia, the King's Royal mother was married in Germany to James, Lord Forrester," memorialist's father, whose estate and honour descended to a collateral branch, being unfortunately murdered, left her very poorly provided. Has avoided as much as possible to beseech relief until now, in her great age, when she is reduced ..."
https://babel.hathitrust.org/cgi/pt?id=msu.31293027028053&view=1up&seq=260&q1=ballentyne
She must be the Hon. Patricia Ruthven, born in October 1668, according to Cracroft's Peerage:
James [Baillie later Forrester], 2nd Lord Forrester of Corstorphine
1st son and heir of Maj Gen William Baillie of Letham and Torwoodhead (by his wife Janet Bruce), illegit. son of Sir William Baillie of Lamington by his mistress, later wife, ..... Home, dau. of Sir Alexander Home of North Berwick
born
29 Oct 1629
mar. (1)
after 15 Dec 1649 Hon Joanna Forrester (dspms. after 8 Feb 1652), 4th dau. and cohrss. of George [Forrester], 1st Lord Forrester of Corstorphine, by his wife Christian Livingston, dau. of Sir William Livingston of Kilsyth
only child by first wife
1. William Forrester (b. 8 Feb 1652; dvp. an infant)
mar. (2)
before Jul 1661 Lady Jean Ruthven (d. after Oct 1668), 3rd dau. and cohrss. of Patrick [Ruthven], 1st Earl of Forth and Brentford, by his second wife Jane Henderson, sister of Col John Henderson
children by second wife
1. Hon Charles Ruthven (b. 21 Jul 1661; dvp. young)
2. Hon Edward Ruthven, an officer in the Life Guards (b. 19 Feb 1663; d. 1682), mar. Martha Temple
3. Hon John Ruthven (b. 9 May 1666; dvp. young)
1. Hon Clara Ruthven (b. 16 Jan 1665), mar. (1) 11 Oct 1683 Andrew Dick, advocate, and (2) ..... Murray of Spot
2. Hon Patricia Ruthven (b. 28 Oct 1668; d. after 1694)
died
26 Aug 1679
suc. by
brother
Note: a zealous loyalist, he was fined £2,500 in 1654 under Cromwell's Act of Grace and Indemnification; he seduced his first wife's niece, Christian Hamilton, and was murdered by her
http://www.cracroftspeerage.co.uk/forrester1633.htm
The name "Ballentyne" must refer to some marriage's of hers, though Scotswomen usually went by the maiden name at this time. Perhaps the titles along with a name change (her father's birth surname was Baillie, not Forrester), led to adoption of the husband's name.
The only other thing I find about her is that she was called "Patricia Ruthven, grand-child to the earl of Bramford" in a list dating from around 1696.
https://babel.hathitrust.org/cgi/pt?id=mdp.39015013473726&view=1up&seq=31&q1=bramford