| Alderman (33,751) | Alderson (22,332) | Aldez (17,137) |
| Aldonado (18,274) | Aldrich (86,694) | Aldridge (78,039) |
| Alejandro (17,593) | Aleman (35,310) | Alex (11,627) |
| Alexander (820,702) | Alfaro (55,590) | Alfonso (23,348) |
| Alford (107,382) | Alfred (20,782) | Alger (23,471) |
| Ali (94,305) | Alicea (25,442) | Alker (49,475) |
| All (68,956) | Allan (40,325) | Allard (43,886) |
| Allen (2,142,219) | Alley (63,960) | Allgood (12,940) |
| Allison (221,446) | Allman (32,378) | Allred (45,815) |
| Almanza (20,207) | Almaraz (9,998) | Almeida (30,082) |
| Almond (19,442) | Almonte (12,645) | Alonso (50,115) |
| Alonzo (38,462) | Alston (93,179) | Alt (17,751) |
| Altamirano (15,906) | Alter (19,797) | Altman (56,191) |
| Alton (34,436) | Alva (10,399) | Alvarado (246,173) |
| Alvardo (10,983) | Alvarez (462,658) | Alverez (10,063) |
| Alverson (11,568) | Alves (26,924) | Alvey (13,084) |
| Alvis (11,097) | Amador (35,413) | Amann (12,372) |
| Amaral (16,978) | Amaro (17,156) | Amato (35,250) |
| Amaya (49,551) | Ambriz (12,628) | Ambrose (57,232) |
| Amerson (11,647) | Ames (132,010) | Amick (14,965) |
| Amico (15,566) | Amin (11,044) | Amirez (99,149) |
| Ammerman (10,073) | Ammon (9,901) | Ammons (28,892) |
| Amos (151,651) | Ampbell (21,986) | Ams (18,520) |
| Amundson (20,051) | Amy (15,686) | Anaya (38,969) |
| Anchez (98,292) | Anders (115,001) | Andersen (116,168) |
| Anderson (3,557,891) | Andino (11,314) | Andrade (110,915) |
| Andre (26,927) | Andrea (14,718) | Andres (32,016) |
| Andrew (70,610) | Andrews (577,482) | Andrus (32,628) |
| Ane (12,127) | Ang (33,752) | Angel (92,857) |
| Angela (14,975) | Angeles (18,574) | Angell (27,130) |
| Angelo (42,371) | Angle (21,474) | Anglin (26,015) |
| Anguiano (23,170) | Angulo (19,246) | Angus (12,922) |
| Ann (61,839) | Anna (12,122) | Anne (12,261) |
