Meaning and history
From Japanese 直 (nao) meaning “straight, direct” and 樹 (ki) meaning “tree,” though it may also be written with other kanji combinations that are pronounced the same way.
20052005: no US SSA record for this spelling
2006: 12 births, rank #6,460
2007: 7 births, rank #9,788
2008: 5 births, rank #12,553
2009: 6 births, rank #10,994
20102010: 8 births, rank #8,803
2011: 14 births, rank #5,945
2012: 5 births, rank #12,274
2013: 7 births, rank #9,655
2014: 10 births, rank #7,562
20152015: 8 births, rank #8,744
2016: 9 births, rank #8,146
2017: 7 births, rank #9,696
2018: 9 births, rank #8,154
2019: no US SSA record for this spelling
20202020: 16 births, rank #5,451
2021: 5 births, rank #12,146
2022: 5 births, rank #12,330
2023: 5 births, rank #12,239
20242024: 8 births, rank #8,987
In 2024, 8 babies were recorded with the name Naoki, ranking #8,987 among boys.