[name_f]Maris[/name_f] is the Latin for sea, what would be some other names that mean sea or ocean(other languages, etc)
[name_f]Oceane[/name_f]
[name_f]Neri[/name_f]
[name_f]Moana[/name_f]
[name_f]Doris[/name_f] (“gift of the ocean”)
[name_u]Pasha[/name_u] (“of the ocean”)
[name_f]Cordelia[/name_f] (“daughter of the sea”)
[name_u]Kai[/name_u]
[name_u]Dylan[/name_u] (“son of the sea”)
[name_f]Marilla[/name_f]
[name_f]Marina[/name_f] (“from the sea”)
[name_f]Maren[/name_f]
[name_u]Morgan[/name_u]
[name_f]Firth[/name_f]
[name_f]Muriel[/name_f] (“of the bright sea”)
[name_f]Nerissa[/name_f] (“from the sea”)
[name_f]Nerida[/name_f] (“sea nymph”)
[name_f]Pelagia[/name_f]
[name_f]Ula[/name_f] (“gem of the sea”)
[name_f]Thalassa[/name_f]
Found these gorgeous names on "Water" Names
Cotovatre “Name of a lake”
Lausanne “[name_u]Lake[/name_u] [name_f]Geneva[/name_f]”
Nimiane “The Lady of the [name_u]Lake[/name_u]”
Nimue “The Lady of the [name_u]Lake[/name_u]”
Nineve “The Lady of the [name_u]Lake[/name_u]”
Nyneve “The Lady of the [name_u]Lake[/name_u]”
[name_f]Viviane[/name_f] “Another name for The Lady of the [name_u]Lake[/name_u]”
[name_u]Vivien[/name_u] “Another name for The Lady of the [name_u]Lake[/name_u]”
[name_f]Cordelia[/name_f] “Of the sea”
Coventina “Water goddess”
[name_f]Genevieve[/name_f] “White wave”
[name_f]Jennifer[/name_f] “White wave”
[name_f]Jenny[/name_f] “White wave”
Jennyfer “White wave”
Jennyver “White wave”
[name_f]Marella[/name_f] “Shining sea. Variant of [name_f]Muriel[/name_f].”
[name_f]Marilla[/name_f] “Shining sea. Variant of [name_f]Muriel[/name_f].”
[name_u]Meredith[/name_u] “Protector of the sea”
[name_u]Morgan[/name_u] “Dweller of the sea”
[name_f]Morgana[/name_f] “Dweller of the sea”
[name_f]Morgance[/name_f] “Dweller of the sea”
[name_f]Morgane[/name_f] “Dweller of the sea”
[name_f]Muriel[/name_f] “Shining sea”
[name_f]Ula[/name_f] “Sea jewel”
[name_f]Una[/name_f] “White wave”
Aerwyna “[name_m]Friend[/name_m] of the sea”
[name_f]Beverlee[/name_f] “Beaver stream”
[name_f]Beverley[/name_f] “Woman from the beaver meadow. Beaver stream.”
[name_f]Beverly[/name_f] “Woman from the beaver meadow. Beaver stream.”
[name_u]Brook[/name_u] “Water; stream”
[name_u]Brooke[/name_u] “Water; stream”
[name_u]Brooklyn[/name_u] “Water; stream”
[name_f]Brooklynn[/name_f] “Water; stream”
[name_f]Brooklynne[/name_f] “Water; stream”
[name_f]Diona[/name_f] “From the sacred spring”
[name_f]Diondra[/name_f] “From the sacred spring”
[name_u]Dione[/name_u] “From the sacred spring”
[name_f]Dionna[/name_f] “From the sacred spring”
[name_f]Dionne[/name_f] "From the sacred spring
[name_m]Earwine[/name_m] “[name_m]Friend[/name_m] of the sea”
[name_m]Earwyn[/name_m] “[name_m]Friend[/name_m] of the sea”
Earwyna “[name_m]Friend[/name_m] of the sea”
Eathelin “[name_m]Noble[/name_m] waterfall”
Eathelyn “[name_m]Noble[/name_m] waterfall”
[name_f]Ebba[/name_f] “Flowing tide”
Edlen “[name_m]Noble[/name_m] waterfall”
[name_u]Edlin[/name_u] “[name_m]Noble[/name_m] waterfall”
[name_f]Edlyn[/name_f] “[name_m]Noble[/name_m] waterfall”
Erwina “[name_m]Friend[/name_m] of the sea”
Erwyna “[name_m]Friend[/name_m] of the sea”
[name_f]Genna[/name_f] "Variant of [name_f]Jenny[/name_f]. “White wave”
[name_f]Genny[/name_f] "Variant of [name_f]Jenny[/name_f]. “White wave”
Irvetta “[name_m]Friend[/name_m] of the sea”
Irvette “[name_m]Friend[/name_m] of the sea”
[name_f]Lin[/name_f] “Waterfall”
[name_u]Lyn[/name_u] “Waterfall”
[name_u]Lynn[/name_u] “Waterfall”
[name_f]Meriel[/name_f] “Variant of [name_f]Muriel[/name_f] “shining sea”
[name_f]Orabel[/name_f] “Beautiful seacoast”
[name_f]Orabelle[/name_f] “Beautiful seacoast”
[name_f]Rilletta[/name_f] “Stream”
[name_f]Rillette[/name_f] “Stream”
[name_f]Tyna[/name_f] “[name_u]River[/name_u]”
[name_f]Tyne[/name_f] “[name_u]River[/name_u]”
[name_u]Vivian[/name_u] “In [name_f]Malory[/name_f]‘s [name_m]Mort[/name_m] d’[name_m]Arthur[/name_m] [name_u]Vivien[/name_u] was the Lady of the [name_u]Lake[/name_u]”
[name_f]Viviana[/name_f] “In [name_f]Malory[/name_f]‘s [name_m]Mort[/name_m] d’[name_m]Arthur[/name_m] [name_u]Vivien[/name_u] was the Lady of the [name_u]Lake[/name_u]”
[name_f]Vivianna[/name_f] “the Lady of the [name_u]Lake[/name_u]”
[name_f]Vivianne[/name_f] The Lady of the [name_u]Lake[/name_u]”
[name_f]Meri[/name_f] “Sea”
Also found these ones on NameBerry;
[name_f]Oceana[/name_f]
[name_u]Ocean[/name_u]
[name_m]Tide[/name_m]
[name_f]Oceane[/name_f]
[name_f]Hope[/name_f] you find what you’re looking for 
[name_m]Deniz[/name_m] means sea in Turkish
[name_f]Su[/name_f] means water
Nehir means river
[name_f]Lara[/name_f] means water fairy
Damla means drop
[name_f]Marine[/name_f]
[name_f]Oceane[/name_f]
[name_f]Oceania[/name_f]