Worked with a guy with a really long set of names. Found out much later that what I thought was his first name (which he went by) was actually the initials of his names before the family name.
That's a pretty common way for people to modify their names into a more practical form (I'm sure typing all that out is a pain). This is why you shouldn't ever assume properties of people's names, and should instead write UIs which confirm the name's properties with the user.
Just for fun, I wrote a quick query to pull the head from my DB.
NAME_LENGTH_CHARS, NAME_TEXT
91 'Mary Abigail KawenaʻUlaokalaniahiʻIakaikapoliopelekawahineʻAihonuaināleilehuaapele Wiggin Pukui'
85 'Upatissa Atapattu Bandaranayake Wasala Mudiyanse Ralahamilage Shirani Anshumala Bandaranayake'
83 'Wanisekara Bandaranayake Wasala Mudiyanse Ralahamilage Aluwihare Uda Walauwe Alick Aluwihare'
68 'Guido Georg Friedrich Erdmann Heinrich Adalbert Graf Henckel von Donnersmarck'
66 'Wasalakulathunga Wijekoon Mudiyanselage Duleeka Kumari Wijekoon Marapana'
65 'Clemens Erwein Heinrich Karl Bonaventura Freiherr von und zu Franckenstein'
59 'Guillaume Joseph Hyacinthe Jean-Baptiste Le Gentil de la Galaisière'
58 'Weerasooriya Dissanayake Mudiyanselage Punchi Banda Dissanayake'
56 'Charles de Marguetel de Saint-Denis, seigneur de Saint-Évremond'
56 'Venerable Professor Kollupitiye Mahinda Sangharakkhitha Thera'
...
(EDIT TO ADD: These are all names initially sourced from Wikipedia)
No these are all names of public figures pulled from Wikipedia, not names submitted by individuals, because of the obvious privacy violations. Each name has a corresponding Wikipedia article. I should have clarified initially though.
