What does Lysander mean?
Lysander means “liberator” or “releaser of men” in Greek.
What does Cosmo mean?
Cosmo comes from the Greek kosmos, “order,” “harmony” or “universe.”
Lysander vs Cosmo
Which is more popular?
Lysander is more popular than Cosmo today: about 95 US babies were given the name Lysander in 2025, compared with 80 named Cosmo.
| Lysander | Cosmo | |
|---|---|---|
| Meaning | Liberator | Order, universe |
| Origin | Greek | Greek |
| Gender | Boy | Boy |
| Pronunciation | ly-SAN-der | KOZ-moh |
| Syllables | 3 | 2 |
| First appeared | 1931 | 1910 |
| Peak year | 2025 (95) | 2022 (99) |
| In 2025 | 95 | 80 |
| Trend | Near its peak | Rising |
Popularity over time, 1880–2025
Lysander
Cosmo
Source: US Social Security Administration.
Births by decade
| Decade | Lysander | Cosmo |
|---|---|---|
| 2020s | 256 | 510 |
| 2010s | 301 | 282 |
| 2000s | 151 | 254 |
| 1990s | 5 | 172 |
| 1980s | 21 | 108 |
| 1970s | 38 | 128 |
| 1960s | 15 | 121 |
| 1950s | 6 | 191 |
| 1940s | 0 | 191 |
| 1930s | 5 | 286 |
| 1920s | 0 | 452 |
| 1910s | 0 | 254 |
Frequently asked questions
Is Lysander or Cosmo more popular?
Lysander is more popular than Cosmo today: about 95 US babies were given the name Lysander in 2025, compared with 80 named Cosmo.
What is the difference between Lysander and Cosmo?
Lysander means Liberator (Greek origin), while Cosmo means Order, universe (Greek origin).
Which name is older, Lysander or Cosmo?
In US records, Lysander first appears in 1931 and Cosmo in 1910, so Cosmo has the longer recorded history.