Enguerrand V de Coucy
Enguerrand V, Lord of Coucy( after 1321) inherited the title of Lord of Coucy and castle from his maternal uncle, Enguerrand IV in 1311.
He was also lord of Oisy and Montmirail.
Thomas, Lord of Coucy
Thomas of Marle, Lord of Coucy and Boves, was born in 1073 to Enguerrand I of Boves, the Lord of Coucy and his wife Adele of Marle.
After the death of his father, Enguerrand I, Thomas would become the Lord of Coucy and his family's other holdings.
As the best- known of the Lords of Coucy, Thomas of Marle would become infamous for his aggressive and brutal tactics in war and his continued rebellion against the authority of Louis VI.
Bernard III, Lord of Lippe
Bernard III, Lord of Lippe was a German nobleman.
He was the ruling Lord of Lippe from 1229 until his death.
Enguerrand III, Lord of Coucy
Enguerrand III de Boves, Lord of Coucy (c.1182–1242) was the eldest son and successor of Ralph I, Lord of Coucy (c. 1134 – 1191) and Alix de Dreux.
He succeeded as Lord of Coucy ("sieur de Couci") in 1191, and held it until his death; he was also lord of Marle and Boves.
John II, Lord of Polanen
John III, Lord of Polanen( – 3 November 1378 in Breda) was Lord of Polanen, Lord of De Lek and Lord of Breda.
Raoul II, Lord of Coucy
Raoul II, Lord of Coucy( died 1250) was a son of Enguerrand III and his wife Maria of Oisy.
In 1246 he succeeded his father as lord of Coucy.
Raoul died at the siege of El Mansoura in Egypt during the Seventh Crusade.
Raoul married Elisabeth, daughter of Walter III of Châtillon, and later remarried to Philippe of Dammartin, daughter of Simon of Dammartin.
Enguerrand IV de Coucy
Enguerrand IV, Lord of Coucy( c. 1236 – 1311) was the son of Enguerrand III, Lord of Coucy and Marie de Montmirail.
He succeeded his older brother Raoul II, Lord of Coucy, serving as the Sire de Coucy from his brother's death in 1250 until his own in 1311.
John III, Lord of Arkel
John III, Lord of Arkel( c. 1275- 24 December 1324) was Lord of Arkel from 1297 until his death in 1324.
Ralph I, Lord of Coucy
Ralph of Coucy, (c. 1134 – 1191), lord of Coucy, lord of Marle, La Fère, Crécy (sur-Serre), Vervins, Pinon, Landouzy (la-Ville), and Fontaine (lès-Vervins).
He was the son of Enguerrand II, Lord of Coucy and Agnes de Beaugency.
Henry II of Namur
Henry II( 1206 – 1229) was the margrave of Namur from 1226 to his death.
He was the third son of the Peter II of Courtenay, Latin Emperor and Yolanda of Flanders.
When his eldest brother, Philip II, Marquis of Namur died in 1226 without an heir, his second brother Robert was already Latin Emperor in Constantinople, so Henry became the new Margrave of Namur, under regency of Enguerrand III, Lord of Coucy.
When his brother Robert died in 1228, Henry renounced the title of Latin Emperor, which went to his younger brother Baldwin .< br>
Henry died himself one year later without children, and he was succeeded by his sister Margaret, married to Henry, count of Vianden.

Question: Who is Enguerrand Iii, Lord Of Coucy's paternal grandfather?