From the 1st marriage:
Princess Münire Sultan
Princess Fenire Sultan
Princess Fatma Ulviye Sultan
Princess Rukiye Sabiha Sultan Hanım Efendi
From the 3rd marriage:
Prince Mehmed Ertuğrul Efendi

Full name
Mehmed bin Abdul Mecid

Dynasty

Osmanli (Ottoman)

Father

Abdülmecid I

Mother

Gülüstü Hanım

Signature

Full name
Mehmed bin Abdul Mecid

Royal styles of Mehmed VI

Reference style	His Imperial Majesty
Spoken style	Your Imperial Majesty
Alternative style	Sire

Mehmed VI (Ottoman Turkish: محمد السادس‎ Meḥmed-i sâdis, وحيد الدين Vahideddin, Turkish: Vahideddin or VI. Mehmed), who is also known as Şahbaba (meaning "Emperor-father") among his relatives, (14 January 1861 – 16 May 1926) was the 36th and last Sultan of the Ottoman Empire, reigning from 1918 to 1922. The brother of Mehmed V, he succeeded to the throne as the eldest male member of the House of Osman after the 1916 suicide of Abdülaziz's son Yusuf Izzettin Efendi, the heir to the throne. He was girded with the Sword of Osman on 4 July 1918, as the thirty-sixth padishah. His father was Sultan Abdülmecid I and mother was Gülüstü Hanım (1830 – 1865), an ethnic Abkhazian, daughter of Prince Tahir Bey Çaçba and his wife Afişe Lakerba, originally named Fatma Çaçba. Mehmed was removed from the throne when the Ottoman sultanate was abolished in 1922.

He was born in the Dolmabahçe Palace or the Beşiktaş Palace, Beşiktaş, both in Istanbul.

The First World War was a disaster for the Ottoman Empire. British and allied forces had conquered Baghdad, Damascus, and Jerusalem during the war and most of the Empire was divided among the European allies. At the San Remo conference of April 1920, the French were granted a mandate over Syria and the British were granted one over Palestine and Mesopotamia. On 10 August 1920, Mehmed's representatives signed the Treaty of Sèvres, which recognized the mandates and recognized Hejaz as an independent state.

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Wikipedia