What man is mentioned only once in the Bible?

Answer 1

Too many to list here.

In the lists of genealogy many names appear only twice, in the format x begat y and y begat z we see the name y twice.

To list only those whose name begins with Z

1. the word - Zabbai - appears twice
2. the word - Zabdiel - appears twice
3. the word - Zaccai - appears twice
4. the word - Zarah - appears twice
5. the word - Zebaim - appears twice
6. the word - Zelek - appears twice
7. the word - Zepho - appears twice
8. the word - Zetham - appears twice
9. the word - Zibiah - appears twice
10. the word - Zilthai - appears twice
11. the word - Zimran - appears twice
12. the word - Ziza - appears twice
13. the word - Zophah - appears twice