Peipsi

...Hydraulically, the lake is called Chud-Pskov Lake because it is a system of three adjacent lakes. Historically, Lake Chud was called Lake Gdov and Lake Peipsi. The southernmost (upper reaches) is Lake Pskov (710 km2), followed by Lake Tyoploe (170 km2), and the northernmost Lake Chud (2,700 km2), from which the Narva River flows out and empties into the Gulf of Finland (the innermost part of the Baltic Sea).

*Some of the terminology explanations that mention "Peipsi" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…水理学上は相接する3湖がシステムをなすためチュド･プスコフ湖Chudsko‐Pskovskoe ozeroと呼ぶ。歴史上はチュド湖はグドフ湖Gdovskoe ozero，ペイプシ湖Peipsiの名で呼ばれた。最も南(上流部)にプスコフ湖(710km2)，次にチョープロエ湖Tyoploe ozero(170km2)，最北部にチュド湖(2700km2)があり，ここからナルバ川が流れ出てフィンランド湾(バルト海の奥部)に注ぐ。…

※「Peipsi」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報