The Spanish word "chongo" comes from the Mapudungun (indigenous language of the Mapuche people) word "thonco", which meant "wooden plate" or "ordinary glass vessel". In modern Spanish, particularly in Mexico, the word evolved to mean "hair bun", likely due to the similar round, vessel-like shape. In other regions, the word has taken on additional meanings like "worn-out object" or "casual relationship", showing how the meaning has expanded and varied across different Spanish-speaking areas.

Since "chongo" comes from Mapudungun rather than Latin or Greek roots, there aren't many commonly used, etymologically related Spanish words. This is typical of words that entered Spanish from indigenous American languages.

There aren't any etymologically related English words since "chongo" comes from Mapudungun, an indigenous language of South America. English and Mapudungun developed completely independently of each other with no historical contact or shared ancestry.