Crown Prince Hyodeok

{{Short description|Goryeo prince (fl. 10th century)}}

{{Infobox royalty

| name =Prince Hyodeok

| image =

| caption =

| birth_name =

| birth_date = ?

| birth_place =Gaegyeong, Goryeo

| death_date = ?

| death_place =Gaegyeong, Goryeo

| burial_date =

| burial_place =

| royal house =House of Wang

| father =Daejong of Goryeo

| mother =Queen Seonui

| religion =Buddhism

| module={{Infobox Korean name|child=yes

|hangul= 효덕태자

|hanja= {{linktext|孝|德|太|子}}

|rr=Hyodeok Taeja

|mr=Hyodŏk Ta'ech'a

}}}}

Prince Hyodeok was a Goryeo royal family member as the first son of Wang Uk and a grandson of Wang Geon, its founder.{{cite book|date=2006|title=韓國人物史硏究|trans-title=The Research of Korean History issue 5|url=https://books.google.com/books?id=anZKAQAAIAAJ&q=%ED%9A%A8%EB%8D%95%ED%83%9C%EC%9E%90|language=ko|pages=85, 86|publisher=Jingren Cultural Society|access-date=June 24, 2021}} He was the oldest brother of King Seongjong, Queen Heonae, and Queen Heonjeong.{{Citation needed|date=April 2024}} Since their parents had died when he was young, he was raised by his paternal grandmother, Queen Sinjeong alongside his siblings.{{cite book|last=Sung-hee|first=Jeong|date=Feb 15, 2007|script-title=ko:이야기 고려왕조사|trans-title=The History of Goryeosa|url=https://books.google.com/books?id=Pm4RAQAAMAAJ&q=%EA%B3%A0%EB%A0%A4+%EC%84%A0%EC%9D%98%EC%99%95%ED%9B%84|page=438,853,856|language=ko|location=University of Michigan|publisher=Cheonga Publishing House|isbn=9788936803605|access-date=June 23, 2021}} Therefore, it was speculated that he lived in Hwangju where Queen Sinjeong came from.{{Citation needed|date=June 2021}} Also, since King Gyeongjong's throne was succeeded by his younger brother and not him, so it might be that he died at a young age before the time of throne's ascension.{{cite book|script-title=ko:고려사|trans-title=Goryeosa vol. 8|url=https://books.google.com/books?id=YPKEAAAAIAAJ&q=%ED%9A%A8%EB%8D%95%ED%83%9C%EC%9E%90|language=ko|location=University of California|publisher=Academy of Sciences Publishing House|access-date=June 24, 2021}}