No, "Christopher" is not the longest name. While it is a relatively long name, there are many names that are significantly longer, such as "Hubert Blaine Wolfeschlegelsteinhausenbergerdorff" and others. Additionally, some cultures have names that can be much longer due to the inclusion of multiple components or family names.
Christopher Saphire's birth name is Christopher Donald Saphire.
Christopher Romano's birth name is Romano, Christopher Dante.
Christopher Ricks's birth name is Christopher Bruce Ricks.
Christopher Mayhew's birth name is Christopher Paget Mayhew.
Christopher McLean's birth name is Christopher Andre McLean.
Opfogjrbskfeepnepnkaseyoinnbretn. Pronounced Op-Gir-Feep-Nep-Kasey-Yoin-Bret
Christopher Dorrah's birth name is Christopher Daune Dorrah.
Christopher Scollard's birth name is Fatone, Christopher.
Christopher Coffelt's birth name is Christopher A. Coffelt.
Christopher Llewellyn's birth name is Christopher Griffiths.
Christopher Spencer's full name is Christopher Miner Spencer.
Christopher Sieber's birth name is Christopher L. Sieber.
Christopher Slade's birth name is Christopher Wade Temple.
Christopher Slaughter's birth name is Christopher Carroll Slaughter.
Christopher Saphire's birth name is Christopher Donald Saphire.
Christopher Shand's birth name is Christopher Ian Shand.
Christopher Shays's birth name is Christopher H. Shays.