Núrayn-i-Nayyirayn

Núrayn-i-Nayyirayn (Arabic: نورين نيران‎‎, meaning "twin shining lights") are two brothers who were followers of Bahá'u'lláh, the founder of the Bahá'í Faith, a global religion of Persian origin. They were beheaded in 1879 as a result of being Bahá'ís. Numerous letters and tablets were written in their honour by Bahá'u'lláh, who gave them the titles which they are commonly known as: the King of Martyrs and the Beloved of Martyrs.

The older brother was Mírzá Muhammad-Husayn, given the title Mahbúbu'sh-Shuhadá' (Beloved of Martyrs). His brother was Mírzá Muhammad-Hasan, given the title Sultánu'sh-Shuhada' (King of Martyrs). The latter was identified as one of the nineteen Apostles of Bahá'u'lláh.

The two were both natives of Isfahan, and were both rich and highly endowed with trading acumen. They were beheaded in the city of Isfahan in 1879 as a result of three persons: Mir Muhammad-Husayn, the Imám-Jum'ih of Isfahan; Shaykh Muhammad-Baqir, another influential Muslim cleric of Isfahan; and Sultán-Mas'úd Mírzá, the son of Násiri'd-Dín Sháh, who governed Isfahan during the time.

The brothers followed in the footsteps of their father, Mírzá Ibráhím. They had for years helped the Imám-Jum'ih in managing his affairs, making several payments on his behalf, which became quite a substantial amount.

The brothers were merchants, and participated in a trading network with the Afnán (relatives of the Báb), who had a vast and profitable network stretching from Hong Kong to the Caucasus as well as Dutchman Johan Colligan. The two brothers were well known to be selfless, upright and kindly men. Part of their success as merchants has been attributed to their record of honest and upright transactions.

...
Wikipedia