Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| # | Temple name | Hangul | Hanja | Period of reign | Personal name | Relationship | Note |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | Onjo | 온조왕 | 溫祚王 | 18 BCE – 28 CE |  | founder | son of Dongmyeongseong of Goguryeo |
| 2 | Daru | 다루왕 | 多婁王 | 28–77 |  | first son of Onjo |  |
| 3 | Giru | 기루왕 | 己婁王 | 77–128 |  | first son of Daru |  |
| 4 | Gaeru | 개루왕 | 蓋婁王 | 128–166 |  | son of Giru |  |
| 5 | Chogo | 초고왕 | 肖古王 | 166–214 |  | son of Gaeru | also Sogo (소고왕, 素古王) |
| 6 | Gusu | 구수왕 | 仇首王 | 214–234 |  | first son of Chogo | also Guisu (귀수왕, 貴須王) |
| 7 | Saban | 사반왕 | 沙泮王 | 234 |  | first son of Gusu | also Sai (사이왕, 沙伊王) |
| 8 | Goi | 고이왕 | 古爾王 | 234–286 |  | second son of Gaeru | also Gui (구이군, 久爾君) |
| 9 | Chaekgye | 책계왕 | 責稽王 | 286–298 |  | son of Goi | also Cheonggye (청계왕, 靑稽王) |
| 10 | Bunseo | 분서왕 | 汾西王 | 298–304 |  | first son of Chaekgye |  |
| 11 | Biryu | 비류왕 | 比流王 | 304–344 |  | second son of Gusu |  |
| 12 | Gye | 계왕 | 契王 | 344–346 |  | first son of Bunseo |  |
| 13 | Geunchogo | 근초고왕 | 近肖古王 | 346–375 | Yeogu | second son of Biryu | also Chogo (초고왕, 肖古王) or Sokgo (속고왕, 速古王) |
| 14 | Geun-gusu | 근구수왕 | 近仇首王 | 375–384 |  | son of Geunchogo | also Guisu (귀수왕, 貴首王) |
| 15 | Chimnyu | 침류왕 | 枕流王 | 384–385 |  | first son of Geungusu |  |
| 16 | Jinsa | 진사왕 | 辰斯王 | 385–392 |  | younger brother of Chimnyu | also Buyeohui (부여휘, 扶餘暉) |
| 17 | Asin | 아신왕 | 阿莘王 | 392–405 |  | nephew of Jinsa; first son of Chimnyu | also Aha (아화왕, 阿華王) |
| 18 | Jeonji | 전지왕 | 腆支王 | 405–420 |  | first son of Asin | also Jikji (직지왕, 直支王) or Jinji (진지왕, 眞支王) |
| 19 | Gu-isin | 구이신왕 | 久爾辛王 | 420–427 |  | first son of Jeonji |  |
| 20 | Biyu | 비유왕 | 毗有王 | 427–455 |  | first son of Guisin | also Yeobi (여비, 餘毗) |
| 21 | Gaero | 개로왕 | 蓋鹵王 | 455–475 | Gyeongsa (경사, 慶司) or Gyeong (경, 慶) | first son of Biyu | also Yeogyeong (여경, 餘慶) |
| 22 | Munju | 문주왕 | 文周王 | 475–477 | Modo (모도, 牟都) or Do (도, 都) | son of Gaero |  |
| 23 | Samgeun | 삼근왕 | 三斤王 | 477–479 | Samgeun (삼근, 三斤), Imgeol (임걸, 壬乞) or Samgeol (삼걸, 三乞) | first son of Munju | also Mun-geun (문근왕, 文斤王) |
| 24 | Dongseong | 동성왕 | 東城王 | 479–501 | Modae (모대, 牟大) or Mamo (마모, 摩牟) | cousin of Samgeum |  |
| 25 | Muryeong | 무령왕 | 武寧王 | 501–523 | Sama (사마, 斯麻 or 斯摩) or Yung (융, 隆) | second son of Dongseong | also Sama (사마왕, 斯麻王), Do (도왕, 嶋王), or Horyeong (호령왕, 虎寧王) |
| 26 | Seong | 성왕 | 聖王 | 523–554 | Myeong (명, 明) | son of Muryeong | also Myeong (명왕, 明王) or Seongmyeong (성명왕, 聖明王) |
| 27 | Wideok | 위덕왕 | 威德王 | 554–598 | Chang (창, 昌) | first son of Seong | also Chang (창왕, 昌王) |
| 28 | Hye | 혜왕 | 惠王 | 598–599 | Gye (계, 季) | younger brother of Wideok | also Heon (헌왕, 獻王) |
| 29 | Beop | 법왕 | 法王 | 599–600 | Seon (선, 宣) or Hyosun (효순, 孝順) | first son of Hye |  |
| 30 | Mu | 무왕 | 武王 | 600–641 | personal name Jang (장, 璋) or Seodong (서동, 薯童) | youngest son of Wideok | also Mugang (무강왕, 武康王) or Mugwang (무광왕,武廣王) |
| 31 | Uija | 의자왕 | 義慈王 | 641–660 |  | first son of Mu |  |
Question:
who had the earliest reign?
Answer:
Onjo