Sagar (pronounced Saagar) is a Sanskrit word for 'Sea' and is a fairly common male first name in India... by Pavlos. I wouldn't say it is a common name, at least not today, but there is an interesting mythology to explain the etymology.
Saikat (Bengali: সৈকত) is a male given name meaning (sea) shore, beach or bank.
Sagar's Anglo-Saxon are patronymic. Most if not all people of this surname descend from a man (or even a number of men) known as Sagar. The name most likely derives from the diphthongal Anglo-Saxon word 'Sægar', meaning 'sea-spear'.
Samudra (समà¥à¤¦à¥à¤°) is a Sanskrit term for "ocean", literally the "gathering together of waters" (saṃ- meaning "together" and -udra meaning "water". Dictionary meaning of samudra is 'confluence' and 'ocean/sea'.
English: variant of Seager. Dutch (de Sager), and North German: occupational name from Dutch, Low German sager 'sawyer'. French: from the Germanic personal name Sagher, composed of the elements sag- (an element related to Gothic and Old High German words meaning 'quarrel', 'law-suit') + hari, heri 'army'.