The Romanian and French both comes from the latin aqua, just like the Italian/Spanish.
Looking into it a bit more, the French is also from the latin source (aqua) - https://en.wiktionary.org/wiki/eau
It also appears to be a very old word as I saw a documentary about the Hittites and the interviewee stated that they may have migrated from Europe.
Germanic - wasser/water/voda/woda
French - eau
Italian/Spanish - aqua/agua
Greek - nero (νερό)
Danish - vand
Romanian - apă
Latvian - udens
Turkish - su
Welsh - dwr