- Yaeger 100
- Yager 183
- Yamada 47
- Yamaguchi 17
- Yamamoto 111
- Yamashita 16
- Yancey 334
- Yancy 48
- Yanes 22
- Yanez 132
- Yang 701
- Yao 35
- Yap 36
- Yarber 37
- Yarborough 124
- Yarbrough 630
- Yarnell 59
- Yates 1846
- Yau 27
- Yazzie 2
- Ybarra 196
- Yeager 729
- Yearwood 38
- Yeary 46
- Yee 561
- Yeh 85
- Yelton 44
- Yeo 30
- Yeomans 56
- Yepez 30
- Yetter 73
- Yeung 108
- Yi 241
- Yim 61
- Yingling 129
- Yip 80
- Yoakum 37
- Yocum 171
- Yoder 1497
- Yoho 36
- Yoo 176
- Yoon 223
- York 1509
- Yoshida 48
- Yost 640
- You 10
- Youmans 83
- Young 9259
- Youngblood 436
- Younger 223
- Youngman 53
- Youngs 100
- Yount 233
- Yousif 11
- Youssef 20
- Yow 33
- Yu 835
- Yuan 56
- Yuen 137
Lasnames By Y