When Henry Thackeray Schwabe married Gertrude Cook on the fifth of July 1894 he thereby connected with a number of interesting families such as: Gertrude's mother Millicent Hamilton Johnson (the Johnson family detailed below), Millicent's mother Charlotte Philipse (the Philipse family of Yonkers, New York, detailed HERE) and Millicent's grandmother Rebecca Franks (the Franks family are detailed HERE).

Johnson, Sir Henry, first baronet (1748–1835), army officer, was born on 1 January 1748, the second son of Allen Johnson (d. 1747) of Kilternan, co. Dublin, and his wife, Olivia, the daughter of John Walsh of Ballykilcavan, Queen's county. His military career began in 1761, when he was appointed ensign in the 28th foot. Promoted captain in 1763 and major in 1775, he served in America during the War of Independence, first as a commander of battalion of light infantry and, from 17 October 1778, as lieutenant-colonel of the 17th foot. In 1779 he was captured with his garrison at Stony Point. After being exchanged, he was court-martialled at his own request and acquitted of blame. In 1781 he was captured again, at Yorktown, and returned to England. On 17 January 1782 he married Rebecca (d. 1823), the daughter of David Franks of Philadelphia. The same year he was made colonel (brevet) of the 81st foot. Following service in Nova Scotia and Newfoundland he was promoted major-general in 1793.

Johnson served in Ireland from 1793 as major-general of recruiting for the English establishment. As a member of the viceroy's ‘cabinet’ of Irish advisers, he favoured the severe counter-insurgency methods first advocated by General Gerard Lake against the United Irishmen in Ulster. Following the outbreak of the 1798 uprising he was posted first to Waterford, then to New Ross, co. Wexford, where, on 5 June 1798, with a garrison of around 1400 troops, mainly militia, yeomanry, and fencibles, he repulsed a rebel force of between 10,000 and 15,000, which, according to an experienced witness, ‘made as severe an attack as is possible for any troops with such arms’ (Colonel Crauford to General Lake, 6 June 1798, Home Office, 100/77/fols. 76–7). During the battle Johnson had several horses shot from under him, and his force withdrew twice before he counter-attacked and drove the assailants from the town. This victory was the turning point in the Wexford rebellion and was achieved largely through Johnson's intelligent redeployments as well as his personal courage in leading the counter-attack at the head of his troops. Johnson's loss totalled ninety, while the rebel casualties were at least 1500. He was subsequently lionized as ‘the saviour of the south’ and was made colonel of the 81st foot on 18 June 1798. However, Cornwallis considered Johnson ‘a wrong-headed blockhead’ (Correspondence of … Cornwallis, 3.116), presumably because of his standing among Irish loyalists, who criticized Cornwallis's lenient policy towards the defeated rebels. Johnson was promoted lieutenant-general in 1799 and became a full general in 1808. He was made a baronet on 1 December 1818 and in 1819 colonel of the 5th foot. The following year he was nominated a GCB.

Johnson and his wife had two sons: Henry Allen, who became aide-de-camp to the prince of Orange, and George Pigot, a captain in the 81st regiment, who was killed in Portugal in 1812. Johnson himself died on 18 March 1835 at his house in Catharine Place, Bath; he has a monument in Bath Abbey. His surviving son inherited the baronetcy.

His grandsons were:

Johnson, Sir Edwin Beaumont (1825–1893), army officer, fourth son of Sir Henry Allen Johnson, baronet (d. 27 June 1860), and of his wife, Charlotte Elizabeth (d. 21 Feb 1883), daughter of Frederick Philipse of Philipsburg, New York, was born at Bath on 4 July 1825. His father, a student of Christ Church, Oxford, was tutor there to the prince of Orange, and, having received a commission in the 81st regiment, accompanied him as aide-de-camp to the Peninsula, where he served under Wellington.

Edwin Beaumont entered Addiscombe College on 7 August 1840, received a commission as second-lieutenant in the Bengal artillery on 10 June 1842, and arrived in India on 12 December of that year. He was promoted lieutenant in July 1845 and served with the 5th troop of the 1st brigade of the Bengal horse artillery in the Sutlej campaign of the First Anglo-Sikh War. He took part in the battles of Ferozeshahr on 21 and 22 December 1845, and of Sobraon on 10 February 1846. From 5 August 1848 to 17 November 1850 he was deputy judge-advocate-general of the Bengal army. In the Punjab campaign of the Second Anglo-Sikh War in 1848–9 he served on the divisional staff of Major-General William Sampson Whish, and was present at the action of the passage of the Chenab River at Ramnagar on 22 November 1848; at the battle of Chilianwala on 13 January 1849; at the battle of Gujrat on 21 February, on Sir Walter Gilbert's staff; in the subsequent pursuit of the Sikhs and Afghans to Peshawar; and at the surrender of the Sikh army on 14 March 1849. He was mentioned in dispatches and noted for a brevet majority on attaining the rank of captain.

From 12 March 1855 Johnson was aide-de-camp to the commander-in-chief in India, Sir William Maynard Gomm, and on 21 December was appointed assistant adjutant-general of artillery in the Oudh division. He was at Meerut when the mutiny broke out in May 1857, and accompanied the column of Brigadier-General Archdale Wilson on its march to join that of the commander-in-chief from Ambala. He took part in the actions on the Hindan River at Ghazi-ud-din-nagar on 30 and 31 May, when he was slightly wounded, and in the action of Badli-ki-sarai on 8 June and the subsequent occupation of the ridge before Delhi. He was promoted brevet captain on 10 June, captain on 25 June, and brevet major on 5 July. He served throughout the siege as assistant adjutant-general. At the assault of 14 September he resumed his place on Wilson's staff. He was mentioned in dispatches and in January 1858 received a brevet lieutenant-colonelcy.

Johnson accompanied Wilson, who commanded the artillery, to the siege of Lucknow as assistant adjutant-general, and on its capture in March 1858 was honourably mentioned for his services. He was made CB, military division, on 26 July. After the mutiny was suppressed he resumed his duties as assistant adjutant-general of the Oudh division, and held the appointment until January 1862, when, after officiating for a time as adjutant-general of the army, he went to England on furlough. He was promoted brevet colonel in January 1863, and regimental lieutenant-colonel in March 1865. On 10 July 1865 he was appointed assistant military secretary for Indian affairs at the headquarters of the army in London, and on 4 August of the following year was nominated an extra aide-de-camp to the duke of Cambridge. He held both appointments until 1 August 1872, when he returned to India, having been promoted major-general in March 1868. On 8 July 1873 he became quartermaster-general in India, but eight months later was summoned home to take his seat as a member of council of the secretary of state for India in October 1874. He was promoted KCB, military division, on 29 May 1875. He again returned to India in 1877, having been appointed military member of the council there on 19 March, and held the office until 13 September 1880. He was promoted lieutenant-general and general in October 1877, and was made CIE in January 1878. He was director-general of military education at the War Office from 10 December 1884 to 31 December 1886. He was made GCB in June 1887 and promoted colonel-commandant, Royal Artillery, in December 1890. Johnson retired from the active list on 31 January 1891, and died at his home, 53 Victoria Road, Kensington, London, on 18 June 1893. He was buried at Hanwell.