Keresfa

Keresfa is a Hungarian term that can refer to more than one topic. In toponymy, it is occasionally found as a place-name in rural Hungary, though there is no widely cited national gazetteer entry confirming a currently inhabited settlement by that exact name. In folk geography and local lore, the form may also describe a landmark tree used as a waypoint or gathering point on a historical route, from which a locality name could arise.

In Hungarian computer science, keresfa is an informal rendering of the term keresőfa, meaning "search tree." A keresőfa is a data structure that stores keys in a way that supports efficient search, insertion, and deletion. The most common example is a binary search tree; variations that maintain balance, such as AVL trees or red-black trees, provide guaranteed logarithmic height. In database and file-system contexts, broader forms like B-trees are also described as search trees.

Because Hungarian toponymy tends to be highly regional, precise information about a current place named Keresfa is limited to local histories, genealogical records, and regional maps. The term’s usage can vary with context, and diacritics may appear as keresőfa or Keresőfa in standard Hungarian orthography, while non-diacritic renderings (keresfa) appear in older texts or non-Hungarian sources.