| Astra | Undine | |
|---|---|---|
| Meaning | Of the stars | Of the waves |
| Origin | latin | latin |
| Gender | Girl | Girl |
| Pronunciation | AS-truh | un-DEEN |
| Syllables | 2 | 2 |
| First appeared | 0 | 0 |
| Peak year | 2022 (69) | 1924 (10) |
| In 2025 | 0 | 0 |
| Trend | Rising | Steady |
Source: US Social Security Administration.
| Decade | Astra | Undine |
|---|---|---|
| 2020s | 350 | 0 |
| 2010s | 115 | 0 |
| 2000s | 31 | 0 |
| 1990s | 37 | 0 |
| 1980s | 79 | 0 |
| 1970s | 118 | 0 |
| 1960s | 19 | 0 |
| 1950s | 5 | 0 |
| 1940s | 17 | 0 |
| 1930s | 0 | 6 |
| 1920s | 0 | 43 |
| 1910s | 0 | 46 |
From Latin 'astra', the plural of 'astrum' ('star'), itself from Greek 'astron'. It evokes the phrase 'ad astra' ('to the stars').
From Latin unda 'wave'. Popularised by the water-nymph heroine of Friedrich de la Motte Fouque's 1811 novella Undine; the undines are elemental water spirits.
Astra and Undine are given to a similar number of US babies today.
Astra means Of the stars (latin origin), while Undine means Of the waves (latin origin).
In US records, Astra first appears in 0 and Undine in 0, so Astra has the longer recorded history.