Princess Hwisin

Princess Hwisin (24 October 1491 – ?), or firstly honoured as Princess Hwisun, was a Joseon Royal Princess and the eldest daughter of Yeonsangun of Joseon and Deposed Queen Sin.

Her title as Princess was abolished after her father's abdication and was titled as Gu Mun-gyeong’s wife, Lady Yi , or Lady Gu to follow her husband's clan, the Neungseong Gu clan.

Early life
On 24 October 1491, the Princess was born when her father, Prince Yeonsan, and her mother, Princess Consort Geochang, were still the heir successor to the throne as Crown Prince and Crown Princess Consort. The Princess was eventually named Yi Su-eok.

Through her mother, the Princess was a cousin of Queen Dangyeong and was a cousin-in-law of Princess Gyeongsun; the daughter of King Seongjong. She eventually became the great-grandaunt of Queen Inheon through her brother-in-law, Gu Hui-Gyeong, and his wife, Lady Shin of the Geochang Shin clan ; who also happened to be her and Queen Dangyeong’s younger cousin.

Princess Hwisin was the only child within her siblings to have survived to adulthood.

Marriage
The Princess was arranged to marry with Gu Su-yeong's fourth son, Gu Mun-gyeong, in 1510 who was then given the title of Lord Neungyang or Prince Consort Neungyang. The couple had three sons named Gu Eom in 1512, Gu Ham in 1515, and Gu Dam in 1518. Gu Su-yeong was already the son-in-law of Grand Prince Yeongeung, the eighth son of Sejong of Joseon and Queen Soheon.

The Princess's maternal grandmother was Princess Jungmo, the first daughter of Grand Prince Imyeong with Grand Princess Consort Jean of the Jeonju Choi clan. The Princess's mother-in-law was Princess Gilan who was also the daughter of Grand Prince Yeongeung. Both Grand Prince Imyeong and Grand Prince Yeongeung were the sons of King Sejong and Queen Soheon and became her great-grandfathers. Princess Gilan was also a maternal cousin of Queen Jeongsun.

Yeonsangun’s Abdication
However, after the Princess's father’s abdication in 1506, Princess Hwisin’s younger brothers died by poisoning through the decision of the royal court despite the King’s objections.

Her home was also confiscated and divided among Park Won-Jong, Yu Soon-jeong, and Sung Hui-an. But 2 years later in 1508, with the opinions of Yun Sun and other officials, the new King, Jungjong of Joseon, reunited the Princess and her husband. The king later visited her and her family as well as giving back her house.

Death
When the Princess and her husband had already died, some of their direct descendants were slowly declining, and Yi Ahn-nul, the only adoptive grandson of their first son Gu Eom, became a civil servant and served the ancestral rites for his grandparents and great-grandparents.

Family
Siblings
 * Father - Yeonsangun of Joseon (23 November 1476 – 20 November 1506)
 * Grandfather - King Seongjong of Joseon (20 August 1457 – 20 January 1494)
 * Grandmother - Queen Jeheon of the Haman Yun clan (15 July 1455 – 29 August 1482)
 * Mother - Queen Jeinwondeok (15 December 1476 – 16 May 1537)
 * Grandfather - Shin Seung-Seon, Duke Jangseong, Internal Prince Geochang (1436–1502)
 * Grandmother - Princess Jungmo, Internal Princess Consort Heungan of the Jeonju Yi clan (1435–?) (중모현주, 흥안부부인 전주 이씨)
 * Unnamed older brother (1490–1494)
 * Younger sister - Princess Yi Bok-eok (공주 이복억; 李福億; 1496–1498)
 * Younger brother - Deposed Crown Prince Yi Hwang (10 January 1498 – 24 September 1506)
 * Younger brother - Yi Seong, Grand Prince Changnyeong (18 June 1501 – 10 October 1507)
 * Younger brother - Grand Prince Yi Yeong-su (1501–1503)
 * Younger brother - Grand Prince Yi In-su (1502 – 12 September 1506)

Husband
 * Gu Mun-gyeong, Lord Neungyang (1491–?)

Issue
 * Son - Gu Eom (1512–?)
 * Son - Gu Ham (1515–?)
 * Son - Gu Dam (1518–?)