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.
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.
Enguerrand II de Coucy
Enguerrand II, Lord of Coucy, known as of La Fère or of Marle, was a French nobleman.
He was also lord of Marle, La Fère, Crécy (sur-Serre), Vervins, Pinon, Landouzy (la-Ville), Fontaine (lès-Vervins), and of several other places.
Unlike his father, the brigand-lord Thomas de Marle, Enguerrand II peacefully administered his lands, building a chapel in his castle (the chapel's foundations survive as some of the oldest remains in Coucy).
Enguerrand joined the army of Louis VII of France during the Second Crusade.
He died in battle and was buried in Nazareth.
In 1131, he married Agnès de Beaugency, daughter of Mathilde de Vermandois and Raoul I of Beaugency.
Agnès gave him two sons:
His main leisure pursuit was hunting in the woods, where legend holds he met and killed a fierce lion or beast which had been terrorising the area, and founded the Order of the Lion to commemorate the event.
Guillaume I de Coucy
Sir Guillaume I de Coucy (died 1335), Lord of Coucy, Oisy, La Fère, Marle and Montmirail was a French nobleman.
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.
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.
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.
John I, Lord of Polanen
John I, Lord of Polanen( – 26 September 1342) 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.
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.

Question: What nationality is Ralph I, Lord Of Coucy's father?
Answer: French