Deed 370 of 1775 (EN email ; CN email ) describes Richard North as 'Ensign in his Majesty's 15 Regiment of Foot'. [Bar 1810; Judge of the Court of Admiralty (I.).]'); Burke states that Ulysses North of Newcastle (4a above) was his uncle.
A Lucinda North, aged 65, of the City of Dublin was buried on (so b c1754, aged c30 in 1784; Clontarf parish records, Dublin) 5a Catherine North. He was Trinity College Dublin, Irish Bar 1811, Judge of Admiralty, and MP for Drogheda (Sketches The Irish Bar by the Right Honorable Richard Lalor Sheil, MP, Vol 1, 1854, Bedfield Publishers 110 Nassau St, New York (Google Books)).
Her executor was Charles Bagot (National Archives: EN email ) She seems to have outlived her husband by 53 years, and when she made her will her daughter was already a widow.
Deed 1770of records a mortgage of lands of Newcastle, 251 ac profitable land plantation measure, Westmeath, from Ulysses North ('eldest son and heir at law of Roger North formerly of Newcastle')to Chas Hornby of Dublin for 500 sterling(EN email (as Book 270, ref. Deed 1767 of records a mortgage for 622/13/8of lands at Newcastle (251 ac, that part held by lease under the Earl of Belvedere), Gurteen, Co Tipperary (304 ac, leased from the representatives of the late Thomas Matthew; now Gurteen Agricultural College, about 2 miles from Clonfree: EN email ), at Gormagh, Kings Co (207 ac, held by lease from George Stepney), and at Lynn (leased to Alexander Swift), from Ulysses, just before his death, to Phillipe North, his brother, witnessed by William North of Clonfad [Phillipe North's son] and Charles North of Tyrrellspass [not placed] and Phillip North of Dublin [presumably Phillipe's second son] (EN email , CN email ).
Catherine would have to have been born shortly after her parents marriage (Mar 1784) to be old enough to marry in 1802 5b John Henry North, b 1789, d aged 42 after a few days illness, m in Dublin Letitia Dorothea Foster (SP3), youngest daughter of the Right Rev William Foster, Lord Bishop of Clogher, sister to the Hon John Leslie Foster MP (see wikipedia entry: he was not John Foster, First Baron Oriel (1740-1828), who was Chancellor of the Exchequer for Ireland: CN email ; her sister was Henrietta Foster, Countess de Salis). Thoms 1819 Directory records J H North, barrister, at 43 Upper Rutland St, Dublin.