Johann Reinhard I, Count of Hanau-Lichtenberg
Count Johann Reinhard I of Hanau-Lichtenberg (13 February 1569, Bitche  – 19 November 1625 Lichtenberg) ruled the county of Hanau-Lichtenberg from 1599 to 1625.
Johann Reinhard II, Count of Hanau-Lichtenberg
Count Johann Reinhard II of Hanau- Lichtenberg( in Bouxwiller – 25 April 1666 in Bischofsheim am Hohen Steg) was a younger son of Count Philipp Wolfgang of Hanau- Lichtenberg( 1595 – 1641) and Countess Johanna of Oettingen- Oettingen( d. 1639).
Countess Johanna Magdalene of Hanau-Lichtenberg
Countess Johanna Magdalene of Hanau-Lichtenberg (18 December 1660, Bischofsheim am Hohen Steg – 21 August 1715, Hanau)
was a daughter of Johann Reinhard II of Hanau-Lichtenberg (1628–1666) and the Countess Palatine Anna Magdalena of Birkenfeld-Bischweiler (1640–1693).
She died on 21 August 1715 and is said to have been buried in the St. Mary's Church in Hanau.
Philipp V, Count of Hanau-Lichtenberg
Philipp V of Hanau- Lichtenberg( 21 February 1541, Bouxwiller – 2 June 1599, Niederbronn) was Count of Hanau- Lichtenberg from 1590 until his death.
Countess Palatine Anna Magdalena of Birkenfeld-Bischweiler
Countess Palatine Anna Magdalena of Birkenfeld-Bischweiler (14 February 1640, Strasbourg – 12 December 1693, Babenhausen) was a daughter of Christian I, Count Palatine of Birkenfeld-Bischweiler (1598–1654) and his first wife, Countess Palatine Magdalene Catherine of Zweibrücken (1606–1648).
Countess Charlotte of Hanau-Lichtenberg
Charlotte, Countess of Hanau- Lichtenberg, full name:" Countess Charlotte Christine Magdalene Johanna of Hanau- Lichtenberg"( 2 May 1700, Bouxwiller – 1 July 1726, Darmstadt) was the wife of landgrave Louis VIII of Hesse- Darmstadt.
Philipp III, Count of Hanau-Lichtenberg
Philipp III of Hanau- Lichtenberg( 18 October 1482 – 15 May 1538, Bouxwiller) was the third Count of Hanau- Lichtenberg.
Friedrich Casimir, Count of Hanau-Lichtenberg
Friedrich Casimir of Hanau( born 4 August 1623 in Bouxwiller; died: 30 March 1685 in Hanau) was a member of the Hanau- Lichtenberg branch of the House of Hanau.
He was the ruling Count of Hanau- Lichtenberg from 1641 and of Hanau- Münzenberg from 1642.
Philipp Wolfgang, Count of Hanau-Lichtenberg
Philipp Wolfgang, Count of Hanau- Lichtenberg( 31 July 1595, Bouxwiller –, Bouxwiller) was a count of Hanau- Lichtenberg.
He ruled the county from 1625 until his death.
Philipp II, Count of Hanau-Lichtenberg
Philipp II of Hanau- Lichtenberg( born 31 May 1462 in Hanau; died: 22 August 1504 in Babenhausen) ruled the County of Hanau- Lichtenberg from 1480 until his death.

Question: Who is the maternal grandfather of Countess Johanna Magdalene Of Hanau-Lichtenberg?
Answer: Christian I