Yes, St. Nicholas of Myra is one of several patron saints of sailors:
Adjutor of Vernon
Andrew the Apostle
Anthony of Padua
Barbara
Botulph
Brendan the Navigator
Brigid of Ireland
Christina of Bolsena
Christopher
Clement I
Constabilis of Cava
Cuthbert
Erasmus
Eulalia of Barcelona
Francis of Paola
Gulstan
Hardoin of Brittany
Idesbald of Dunes
Jodocus
John Roche
Julian the Hospitaller
Lucy of Syracuse
Michael the Archangel
Nicholas of Myra
Nicholas of Tolentino
Nuestra Senora de Guia
Our Lady, Star of the Sea
Our Lady of Guidance
Our Lady of Mount Carmel
Our Lady of Solitude
Peter Gonzales
Phocas the Gardener
Spyridon of Cyrpus
Torpes of Pisa
Walburga
Yes, St. Nicholas of Myra is one of several patron saints of sailors. Once while traveling to the Holy Land the ship he was aboard was caught in a vicious storm. He prayed that the storm cease and it did.
There is no designated patron of Greek sailors. However, St, Nicholas was born in a Greek colony and is a patron saint of sailors.
The patron saint of running water is St. John Nepomucene
Yes, yes and yes. St. Nicholas of Myra is the patron saint of all three plus many more.
Yes, St. Michael is the patron saint of mariners and sailors.
Pope St. Nicholas I is not a patron saint.
St. Michael the Archangel is a patron saint of sailors.
St. Nicholas of Myra is a patron saint of Russia and Greece.
St. Nicholas is not the patron saint of Turkey. He is the patron saint of Russia and Greece.
St. Nicholas of Myra is the patron saint of Greece and Russia.
The patron saint of brides is St. Nicholas.
Correct. He is also the patron saint of many of other countries and occupations.
Only Russia and Greece have Nicholas as their patron saint. All the others do not.