lu is the pinyin and wade–giles romanization of several distinct chinese surnames that are written with different characters in chinese. depending on the character, it may be spelled lú, lǔ, or lù when pinyin tone diacritics are used. lu 卢 and lu 陆 are the most common: both are among the 100 most common surnames in china. languages using the latin alphabet do not distinguish among the different chinese surnames, rendering them all as lu.