TõnissooEstonian Tõnissoo is an Estonian surname meaning "Tõnis' (a masculine given name) swamp". Probably an Estonianization of "Tõnis' son (son of Tõnis)".
TonkinEnglish, Scottish Derived from the name of an ancestor. 'the son of Antony; from the nick. Tony, and with diminutive suffix Ton-kin.
TorvaldssonSwedish Swedish patronymic meaning "son of Torvald". It was the surname name of Erik the Red (Eiríkr Þorvaldsson, anglicized as Erik Thorvaldsson or Erik Torvaldsson), father of Viking explorer Leif Erikson.
TrainorIrish Reduced form of McTraynor, an Anglicized form of Gaelic Mac Thréinfhir "son of Tréinfhear", a byname meaning "champion, strong man" (from tréan "strong" and fear "man").
UmpiérrezSpanish Means "son of Umpierro" in Spanish. The medieval given name Umpierro is of uncertain meaning.
UsSlovene (Rare) Us is a Slovene Surname which in itself is a shortened version of the House Name Ušič,Meaning Son of Us. The surname may be linked the the slovene word Oves, which translates to "Oats", and may have been an occupational surname referring to someone who farmed Oats and or grains.
VasilovBulgarian, Russian Meaning "son of Vasil" in Russian and "from Bulgaria" in Bulgarian.
VəzirovAzerbaijani Means "son of the vizier", from the Arabic title وَزِير (wazīr) denoting a minister or high-ranking official in an Islamic government.
WaltripGerman Derived from the name of the father of the original bearer, indicating the "son of Waldrap." The Germanic personal name Waldrap, is a short form of Walraven, a name used mostly among nobles, knights, and patricians.
XiuChinese From Chinese 修 (xiū) meaning "study, decorate, cultivate" or "tall, long", taken from the name of a son of the legendary emperor Shaohao.
XomperoItalian Meaning uncertain, possibly from Cimbrian somerousch "pack horse", indicating the bearer's strength or occupation. Alternately, may mean "son of Piero".
YousafzaiPashto Means "son of Yusuf" in Pashto. A notable bearer is Malala Yousafzai (1997-), a Pakistani education and human rights activist and a recipient of the Nobel Peace Prize.