Ferdinand I of Limburg Stirum
Ferdinand Gotthard Meinrad of Limburg Stirum, count of Limburg," Fürst" von Styrum, sovereign lord zu Gemen, was born in 1701, son of Maximilian Wilhelm of Limburg Stirum.
He inherited the immediate lordship of Gemen at the death of his cousin the Prince- Bishop of Speyer, August Philipp of Limburg- Stirum- Gemen.
He married Katharina Karoline von Eptingen and they had one son, Ferdinand III, who died young.
Ferdinand I died in 1791 and Gemen passed to his nephew Karl Josef of Limburg Stirum.
Alois of Limburg Stirum
Karl Joseph Alois of Limburg Stirum, count of Limburg Stirum from the branch Limburg- Styrum- Iller- Aichheim, was the son of Maximilian Wilhelm of Limburg Stirum.
He was born in 1685 and died in 1738.
After his father's death he became sovereign lord of Simontornya.
He married countess Maria Theresia Keglevich( died 1728) in 1722 and their children were:
Jobst of Limburg
Jobst of Limburg (19 April 1560, Borculo, Gelderland - 7 August 1621) was count of Limburg and Bronckhorst, Lord of Styrum, Wisch and Borculo (1616), and the son of Hermann Georg of Limburg, count of Limburg and Bronckhorst.
He married in 1591 Countess Maria of Schauenburg and Holstein-Pinneberg and they had issue:
Christian Otto of Limburg
Christian Otto von Limburg Stirum, count of Limburg Bronkhorst and Stirum( 1694 – 1749), was a member of the House of Limburg- Stirum and the third reigning monarch from the branch of Limburg- Styrum- Styrum.
Hermann Otto II of Limburg Stirum
Field Marshal Hermann Otto II of Limburg Stirum( 1 April 1646 – Donauwörth, 8 July 1704), count of Limburg Stirum and Bronckhorst, sovereign lord zu Gemen, was the son of Adolf Ernst of Limburg Stirum and an imperial Field Marshal.
He inherited the immediate lordship of Gemen in 1675, being 18 years after the death of his father during which the regency on Gemen was exercised by his mother Isabella countess von Vehlen und Meggen zu Raesfeld.
The reason for the regency is not known.
On 15 September 1700, a decision by the Courts confirmed its succession right over Gemen.
Ferdinand III of Limburg Stirum
Ferdinand III of Limburg Stirum was the son of Ferdinand I of Limburg Stirum and Katharina Karoline von Eptingen.
Born in 1753, he died at the age of 15 in 1768.
Philipp Wilhelm of Limburg Stirum
Philipp Wilhelm of Limburg Stirum( 1695 – 1758), count of Limburg Stirum, was the second son of Moritz Hermann of Limburg.
He married NN, countess von Hoensbroech and they had five children:
Karl Josef of Limburg Stirum
Karl Josef Maximilian of Limburg Stirum, count of Limburg Styrum, sovereign lord zu Gemen, was the son of Alois of Limburg Stirum.
He inherited the immediate lordship of Gemen from his uncle Ferdinand I of Limburg Stirum in 1791 and remained until his death in 1798.
Alois having survived his three sons, Gemen passed to his grandson Ferdinand IV of Limburg Stirum.
He married Maria Anna Vogel von Wassenhofen and they had five children:
Georg Ernst of Limburg Stirum
Georg Ernst of Limburg Stirum, count of Limburg Stirum, count of Bronckhorst, Lord of Wisch, Lichtenvoorde and Wildenborch, son of Jobst of Limburg.
Georg Ernst was Captain (in 1625), then Major (in 1641) of the Army of the Republic of the United Netherlands.
He married twice.
His first wife was countess Magdalene, the daughter of Arnold III of Bentheim, Limburg and Bronckhorst.
They had one daughter: Marie Elisabeth (d. 1707), who married Henry II, Count of Nassau-Siegen (d. 1665).
Henry and Marie Elisabeth had four children: Ernestine, Frederick, Sophie and William Maurice.
After Magdalena's death, Georg Ernst married in Terborg, on 13 January 1636, to countess Sophie Margarete (1610-1665), a daughter of Count John VII of Nassau-Siegen.
She was a titular countess of Nassau, Katzenelnbogen, Vianden and Diez and Lady of Beilstein.
This marriage was childless.
Georg Ernst died in 1666.
Maximilian Wilhelm of Limburg Stirum
Maximilian Wilhelm of Limburg Stirum( 1653 – 1728), count of Limburg Styrum, sovereign lord of Illereichen and Simontornya.
He was the third son of Adolf Ernst of Limburg Stirum, sovereign lord zu Gemen.
He married in 1677 countess Maria Anna von Rechberg and Rothenlöwen( died 1738).
He left 14 children:

Question: Who is Georg Ernst Of Limburg Stirum's paternal grandfather?
Answer: Hermann Georg of Limburg