This is the 3426th most frequent German word.
joshua
"Joshua" is not a German word; it is a proper name used in both English and German-speaking contexts.
Here, 'Joshua' is used to name the individual being introduced.
Wir haben einen neuen Kollegen namens Joshua.
We have a new colleague named Joshua.
Here, 'Joshua' is used as a proper noun referring to a person.
Joshua spielt jeden Samstag Fußball mit seinen Freunden.
Joshua plays soccer with his friends every Saturday.
In this sentence, 'Joshua' denotes possession and refers to the author of the book.