41 last names begin with Y
- Yaches (1)
- Yamasaki (1)
- Yamen (1)
- Yancey (4)
- Yancy (1)
- Yanders (1)
- Yandes (1)
- Yanik (1)
- Yarbrough (1)
- Yardley (1)
- Yarger (1)
- Yarnell (2)
- Yates (10)
- Yax (3)
- Yeager (1)
- Yeagley (2)
- Yeagly (1)
- Yearka (1)
- Yearly (1)
- Yeary (17)
- Yeich (1)
- Yell (1)
- Yellobrey (1)
- Yerain (1)
- Yoak (1)
- Yoakam (1)
- Yoakum (1)
- Yocum (3)
- Yonce (43)
- Yonts (1)
- York (21)
- Yost (4)
- Youmans (1)
- Younce (4)
- Young (190)
- Youngblood (1)
- Younger (5)
- Youngman (1)
- Yount (2)
- Yucum (1)
- Yust (2)