Transliteration for English / Germanic surnames close to Brohn / Brown / Bruhn. Note that 'Brown' specifically is more typically rendered
布朗 (Bùlǎng) in modern Chinese — so
布罗恩 likely points to a less-common variant.
罗恩 is also a frequent rendering of the given name 'Ron' (e.g. Ron Weasley =
罗恩·
韦斯莱).