始祖

1. Origins, structure, and basic meaning

• Structure: 始祖 is read as しそ and is a noun for the first ancestor of a lineage or the founder of a school or tradition.
• Basic usage: Lineage origin appears in 一族の始祖, while the founder of a school appears in 流派の始祖.

2. Common pitfalls and similar expressions

• Difference from 祖先
  • 祖先 broadly covers ancestors across earlier generations; 始祖 focuses on the person regarded as the line’s starting point.
• Difference from 創始者
  • 創始者 is someone who starts a system, method, or organization; 始祖 more strongly frames the person as the origin of a later lineage or tradition.