哈夫 is a generic two-syllable transliteration of foreign surnames or words ending in '-f' or '-ff' — Half, Haff, Hough, sometimes the German Haff (lagoon, as in Stettiner Haff). Without context, treat as a foreign proper noun.
memory
Sound-mapping: 哈 (hā) for 'Ha-', 夫 (fū) for the '-f' ending. 哈 is also the standard onomatopoeia for laughter (哈哈) — a useful character to know on its own.