本山氏
系譜

実線は実子、点線（縦）は養子、点線（横）は婚姻関係で表記している。
表記上、源（本姓）を源と表記している。
諱が不明な人名がある。
幾つか説があるが、ここではニ説を記した。
八木氏説
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|  |  |  |  |  |  |  |  | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) | (平姓 八木氏) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  |  |  |  |  |  |  | 八木康教 | 八木康教 | 八木康教 | 八木康教 | 八木康教 | 八木康教 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | 八木康教 | 八木康教 | 八木康教 | 八木康教 | 八木康教 | 八木康教 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  |  |  |  |  |  |  | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  |  |  |  |  |  |  | 為時 | 為時 | 為時 | 為時 | 為時 | 為時 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | 為時 | 為時 | 為時 | 為時 | 為時 | 為時 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  |  |  |  |  |  |  | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 有時 | 有時 | 有時 | 有時 | 有時 | 有時 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 源希義　  | 有時 | 有時 | 有時 | 有時 | 有時 | 有時 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | 吉良希望 | (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | (吉良氏) | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 | 本山 (八木)伊典 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 実茂 | 実茂 | 実茂 | 実茂 | 実茂 | 実茂 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 吉良宣直  | 実茂 | 実茂 | 実茂 | 実茂 | 実茂 | 実茂 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | 茂宗 | 茂宗 | 茂宗 | 茂宗 | 茂宗 | 茂宗 |  |  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  |  |  |  |  |  |  | 茂定 | 茂定 | 茂定 | 茂定 | 茂定 | 茂定 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | 茂宗 | 茂宗 | 茂宗 | 茂宗 | 茂宗 | 茂宗 |  |  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  | 長宗我部国親  |  |  |  |  |  |  | 茂定 | 茂定 | 茂定 | 茂定 | 茂定 | 茂定 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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|  |  | 茂辰 | 茂辰 | 茂辰 | 茂辰 | 茂辰 | 茂辰 |   |   | 女 | 女 | 女 | 女 | 女 | 女 | 元親 | 元親 | 元親 | 元親 | 元親 | 元親 | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ |  |  |  |  |  |  | 右近 | 右近 | 右近 | 右近 | 右近 | 右近 |  |  |  |  |  |  |
|  |  | 茂辰 | 茂辰 | 茂辰 | 茂辰 | 茂辰 | 茂辰 |   |   | 女 | 女 | 女 | 女 | 女 | 女 | 元親 | 元親 | 元親 | 元親 | 元親 | 元親 | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ | 茂房 小佐渡守？ |  |  |  |  |  |  | 右近 | 右近 | 右近 | 右近 | 右近 | 右近 |  |  |  |  |  |  |
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|  |  | 親茂 | 親茂 | 親茂 | 親茂 | 親茂 | 親茂 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂直 | 茂直 | 茂直 | 茂直 | 茂直 | 茂直 |  |  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  |  |  |  |  |  |  | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 |  |  |  |  |  |  |
|  |  | 親茂 | 親茂 | 親茂 | 親茂 | 親茂 | 親茂 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂慶 | 茂直 | 茂直 | 茂直 | 茂直 | 茂直 | 茂直 |  |  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  | 　左衛門丞　  |  |  |  |  |  |  | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 | 彦兵衛 |  |  |  |  |  |  |
|   |   |  |  |   |   |  |  |  |  |   |   |  |  |  |  |   |   |  |  |  |  |  |  |   |   |   |   |   |   |   |   |  |  |  |  |   |   |  |  |  |  |  |  |  |  |
|   |   |  |  |   |   |  |  |  |  |   |   |  |  |  |  |   |   |  |  |  |  |  |  |   |   |   |   |   |   |   |   |  |  |  |  |   |   |  |  |  |  |  |  |  |  |
|  |  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 茂基 | 茂基 | 茂基 | 茂基 | 茂基 | 茂基 |  |  | 茂安 | 茂安 | 茂安 | 茂安 | 茂安 | 茂安 | 茂久 | 茂久 | 茂久 | 茂久 | 茂久 | 茂久 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 |  |  |  |  |  |  |
|  |  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 次郎左衛門  | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 貞茂 | 茂基 | 茂基 | 茂基 | 茂基 | 茂基 | 茂基 |  |  | 茂安 | 茂安 | 茂安 | 茂安 | 茂安 | 茂安 | 茂久 | 茂久 | 茂久 | 茂久 | 茂久 | 茂久 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 | 喜左衛門 |  |  |  |  |  |  |
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| 武田信義 | 武田信義 | 武田信義 | 武田信義 | 武田信義 | 武田信義 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 茂益 | 茂益 | 茂益 | 茂益 | 茂益 | 茂益 |  |  |  |  |  |  | 茂正 | 茂正 | 茂正 | 茂正 | 茂正 | 茂正 |  |  |  |  |  |  |
| 武田信義 | 武田信義 | 武田信義 | 武田信義 | 武田信義 | 武田信義 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 茂益 | 茂益 | 茂益 | 茂益 | 茂益 | 茂益 |  |  |  |  |  |  | 茂正 | 茂正 | 茂正 | 茂正 | 茂正 | 茂正 |  |  |  |  |  |  |
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| (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 茂伝 | 茂伝 | 茂伝 | 茂伝 | 茂伝 | 茂伝 |  |  |  |  |  |  | 茂恒 | 茂恒 | 茂恒 | 茂恒 | 茂恒 | 茂恒 |  |  |  |  |  |  |
| (略) | (略) | (略) | (略) | (略) | (略) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 茂伝 | 茂伝 | 茂伝 | 茂伝 | 茂伝 | 茂伝 |  |  |  |  |  |  | 茂恒 | 茂恒 | 茂恒 | 茂恒 | 茂恒 | 茂恒 |  |  |  |  |  |  |
|   |   |   |   |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   |   |  |  |  |  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  |  |
|   |   |   |   |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   |   |  |  |  |  |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  |  |
| 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 操之 | 操之 | 操之 | 操之 | 操之 | 操之 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 茂成 | 茂成 | 茂成 | 茂成 | 茂成 | 茂成 |
| 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 | 板垣信方 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 操之 | 操之 | 操之 | 操之 | 操之 | 操之 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 茂朝 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 政右衛門 | 茂成 | 茂成 | 茂成 | 茂成 | 茂成 | 茂成 |