北元
(?
1378年～?
1388年)
| 姓： | 孛儿只斤 |
| 名： | 脱古斯铁木儿 |
| 网笔号： | 天元皇帝 |
| 庙号： | 益宗 |
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天元帝，又称元益宗，名孛儿只斤·脱古斯铁木儿，父为元惠宗（妥欢帖睦尔），兄为元昭宗（爱猷识里达腊）。他于于1378年即位，年号天元，1388年遭阿里不哥后裔也速迭尔袭杀，死后由儿子思克卓里图继位。
Days of Emperor Yuan, also known as Yuan Yi cases, children were Marco de Bolivar kg iron wood only child, the parent benefits for the dollars were (properly Huan posts Harmony Hill), brother-yuan Akimune (Al You know where up to December). He came to the throne in 1378, Tian Yuan reign, in 1388 by Brother Ali are not descendants of Diel Xisha speed also, after the death of his son Si Kezhuo in Figure succession.