At the age of 74 Baha'u'llah was a father of fourteen children from his three wives.

Baha’u’llah married three (Baha'i Version).

1]. At age 18 in October of 1835, Baha’u’llah married His first wife who was named Asiyyih Khanum; She is reported to have been very beautiful caring and very kind; she was the daughter of Mirza Isma'il Vazir [minister] a wealthy person of the region of Yarlud . 2 years earlier before the marriage of Baha’u’llah, Asiyyih Khanum's brother, Mirza Mahmud, had married Baha’u’llah's older sister named Sarah Khanum. Of course this marriage was in Iran.

2]. When Mirza Buzurg [Baha’u’llah’s father] fell from favor with the Shah, and lost his homes, Baha’u’llah in 1839, after the death of His father, moved to Tehran were He rented a home in the Uldajan Qurter of Tehran and also took in His own mother and most of His father's wives and their children to live with Him. From this marriage, Baha’u’llah had 7 children and only three survived. These three were born in that house in Tehran;

A) In 1844 Abbas was born; He became known by the title He chose, Abdu'l-Baha.
B) In 1846 Fatimih Sultan Khanum was born, who in later years became known as Bayhiyyih Khanum and was given the title of The Greatest Holy Leaf, by Baha’u’llah.
C) in 1850 the youngest son was born and his name was Mirza Mihdi. When Baha’u’llah was exiled to Baghdad they left Mirza Mehdi with family in Tehran because he was too young to withstand that hard trip over the Al Borz Mountains. Mirza Mahdi joined his father later on when he was older, and so he accompanied Baha’u’llah on His exiles to Istanbul, Ediren and Akka were he died at a young age; Mirza Mehdi fell down on a wooden crate from a skylight on the roof of The Most Great Prison and died in there. According to Aqa Husyan Ashch’s unpublished memoirs, and in tablets of Baha’u’llah and Abdul Baha, Mehdi’s dying wish from Baha’u’llah was that the doors of reunion be opened for the friends to be able to attain the presence of Baha’u’llah. Restrictions eased soon after his death…When they buried Mirza Mehdi, an earthquake happened in Akka. Both Asiyyih Khanum and Mirza Mehdi were buried in a cemetery outside the gate of Akka named Nabi Salih…later in 1939 Shoghi Effendi exhumed the two remains and entered them on Mount Carmel close to the Greatest Holy Leaf.. that area is under the House of Justice and is called the Maraaqid. Asiyyih Khanum died in 1886.

3]. As customary of His high social position and what may have also been some family pressure, Baha’u’llah Married His cousin Fatimih in about 1848. This Fatemeh was really a widow when she married Baha’u’llah.. before Baha’u’llah she married off at a very young age to a very much older man, a relative of hers and Baha’u’llah by the name; Shaykh Muhammad `Allamih Nuri, a high ranking Muslim cleric. He dies soon after this marriage and thus Fatimih was a young widow. Fatimih became known as Mahd al Awliyaa.. which in Farsi is pronounced as Mahduliya. This marriage happened in Iran and NOT in Baghdad about the year 1848. From this marriage there were 6 children; only three males and one female survived to adulthood.
Muhammad Ali, Diya’u’llah and Badiy’u’llah… Diya’u’llah died without children, Badi’u’llah had two daughters and Muhammad Ali, al Ghusn al Akbar, at the time of Abdul Baha, had Musa, Shua’u’llah.

4]. In About 1862, Baha’u’llah takes his third; it was upon the insistence of her father who was a staunch believer. Her name was Gawhar Khanum of Kashan. Gawhar Khanum, does not go with Baha’u’llah to exile, she remains in Baghdad and joins Him in Akka in the 1885. From this marriage result in only one girl; Furigiyyih she marries the nephew of the wife of the Bab; his name was Siyyid Ali, who had 4 sons as explained by our brother Abdu’l-Husyan.
In conclusion, Baha’u’llah takes three wives; has 14 children, all marriages were before His public declaration at the Najibiyyih Garden on the River Tigres, in April of 1863.

More here
http://bahai-library.com/wwwboard/messages03/665.html


The Iranian Version (In Persian) - Baha'u'llah Married Four

چهار زن حسینعلی نوری در تضاد با منع تعدد زوجات در بهائیت
..........................................................
بر اساس استفتائات بهائیان از شوقی افندی و عبدالبهاء ( سران بهائیت ) درباره تعداد همسران ، بهائیان مکلف به قبول تک همسری شده اند در حالی که بر اساس نص صریح کتاب اقدس ( نویسنده پیامبر بهائیان داشتن دو زن در آن واحد جایز است . و از سویی با نگاهی بر تاریخ بهائیان به نام چهار زن در لیست زنان بهاء الله می رسیم

میرزا حسینعلی نوری چهار زن به ترتیب زیر داشت  :

1 ـ بانو نوابه که اولین زن میرزا است و پس از آنکه میرزا با یک جهش از مقام بندگی به رتبه ربوبیت و الوهیت ارتقاء یافت بانو نوا به از طرف وی به لقب (( ام الکائنات )) مفتخر گشت . میرزا از این زن دارای سه فرزند گردید دو پسر به نام عباس ( ملقب به غصن اعظم ) . مهدی ( ملقب به غصن اطهر و یک دختر به نام که بعدها به بهائیه خانم و ورقه علیا ملقب گشت .

2 ـ مادر میرزا محمد علی (( غصن اطهر )) و میرزا ضیاء الله و میرزا بدیع الله که اسم دقیقی از ایاین زن بهاء الله در کتب بهائی منتشر نشده است .

3 ـ گوهر خانم کاشی مادر فروغیه خانم .

4 ـ جمالیه خانم که از دوازده  یا سیزده سالگی در خانه میرزا بعنوان خدمتکار می زیسته و چون به سن 16 سالگی رسید میرزا حسین علی نوری که درآن زمان هفتاد سال داشته است دریای مهرش در حق وی به جوش و خروش می آید و نسیم لطفش وزیده او را به همسری خود برگزیده است .

منبع : کتاب جمال ابهی