% Changes, 2019

My previous posts were about changes in ranking, which measures names' popularity relative to each other. Especially near the top of the charts, a name can become more common without necessarily going up much in the rankings. So, to measure how much usage a name is actually gaining, I'll compare percentages between this year and last year. 

Girls:

1. Everleigh, +0.06% (0.08% --> 0.14%)
2. Alaia, +0.06% (0.03% --> 0.09%)
3. Luna, +0.05% (0.37% --> 0.43%)
4. Emilia, +0.04% (0.22% --> 0.26%)
5. Olivia, +0.04% (0.97% --> 1.01%)
6. Willow, +0.04% (0.21% --> 0.25%)
7. Amelia, +0.04% (0.67% --> 0.71%)
8. Isla, +0.04% (0.18% --> 0.22%)
9. Violet, +0.04% (0.26% --> 0.3%)
10. Hazel, +0.03% (0.27% --> 0.3%)
11. Eleanor, +0.03% (0.31% --> 0.34%)
12. Eliana, +0.03% (0.18% --> 0.21%)
13. Arya, +0.03% (0.14% --> 0.17%)
14. Everly, +0.03% (0.23% --> 0.26%)
15. Ivy, +0.02% (0.18% --> 0.2%)
16. Amara, +0.02% (0.08% --> 0.11%)
17. Camila, +0.02% (0.4% --> 0.43%)
18. Valentina, +0.02% (0.19% --> 0.21%)
19. Kehlani, +0.02% (0.05% --> 0.07%)
20. Elliana, +0.02% (0.09% --> 0.11%)

So Olivia, the most common name on this list, was given to about 1 out of every 1030 girls in 2018 (17,921 babies), which rose to about 1 in every 99 girls in 2019 (18,451 babies). 

Boys:

1. Brooks, +0.06% (0.12% --> 0.18%)
2. Noah, +0.05% (0.95% --> 1%)
3. Miles, +0.05% (0.21% --> 0.25%)
4. Theodore, +0.05% (0.36% --> 0.41%)
5. Mateo, +0.05% (0.42% --> 0.47%)
6. Liam, +0.05% (1.03% --> 1.07%)
7. Legend, +0.04% (0.09% --> 0.13%)
8. Luca, +0.04% (0.19% --> 0.23%)
9. Leo, +0.04% (0.35% --> 0.39%)
10. Maverick, +0.04% (0.26% --> 0.3%)
11. Waylon, +0.04% (0.14% --> 0.18%)
12. Luka, +0.04% (0.05% --> 0.09%)
13. Adonis, +0.03% (0.05% --> 0.08%)
14. Oliver, +0.03% (0.69% --> 0.73%)
15. Levi, +0.03% (0.44% --> 0.47%)
16. Ezekiel, +0.03% (0.22% --> 0.26%)
17. Jack, +0.03% (0.46% --> 0.49%)
18. Myles, +0.03% (0.11% --> 0.14%)
19. Roman, +0.03% (0.23% --> 0.26%)
20. Ezra, +0.03% (0.31% --> 0.34%)

Percentage difference favors names that are already popular, so if you want to see how less-common names are gaining usage, percentage ratios are more useful. 

Girls: 

1. Yalitza (16.1x)
2. Alita (6.89x)
3. Dayleen (6.35x)
4. Mazikeen (4.24x)
5. Vaeda (3.12x)
6. Alaia (3.09x)
7. Layne (2.92x)
8. Amoura (2.85x)
9. Maleni (2.8x)
10. Wrenley (2.74x)
11. Nuri (2.66x)
12. Alaiah (2.58x)
13. Cairo (2.51x)
14. Starr (2.22x)
15. Riverlyn (2.2x)
16. Blessyn (2.19x)
17. Vanellope (2.14x)
18. Kiari (2.14x)
19. Theodora (1.98x)
20. Atley (1.98x)

So, Yalitza was approximately 16x more popular for new babies in 2019 than it was in 2018. 

Boys:

1. Armias (≈54.57x)
2. Ermias (34.96x)
3. Sekani (21.14x)
4. Kross (5.87x)
5. Taysom (3.99x)
6. Amiri (3.79x)
7. Broly (3.56x)
8. Laine (3.14x)
9. Kyro (2.58x)
10. Lucah (2.56x)
11. Graycen (2.54x)
12. Amias (2.44x)
13. Ezriel (2.4x)
14. Eliel (2.37x)
15. Zayaan (2.36x)
16. Giannis (2.35x)
17. Khylan (2.33x)
18. Kacey (2.31x)
19. Natanael (2.21x)
20. Kasai (2.18x)

Most of these names are still pretty uncommon. Here are the names that gained the most popularity from 2019's Top 500.

Girls:

1. Alaia (3.09x)
2. Everleigh (1.71x)
3. Amora (1.67x)
4. Alaya (1.63x)
5. Palmer (1.59x)
6. Alayah (1.54x)
7. Everlee (1.48x)
8. Maisie (1.47x)
9. Kehlani (1.45x)
10. Reign (1.36x)

Boys:

1. Crew (2.09x)
2. Baker (1.86x)
3. Kairo (1.84x)
4. Cairo (1.81x)
5. Adonis (1.74x)
6. Luka (1.65x)
7. Colson (1.63x)
8. Legend (1.5x)
9. Brooks (1.49x)
10. Kyler (1.43x)

Everleigh and Kairo again! Kehlani was on last year's list as well.  Love Amora, Maisie, and Luka.