Samuel Plimsoll (10 February 1824 – 3 June 1898) was a British politician and social reformer, now best remembered for having devised the Plimsoll line (a line on a ship's hull indicating the maximum safe draft, and therefore the minimum freeboard for the vessel in various operating conditions).

Samuel Plimsoll was born in Bristol and soon moved to Whiteley Wood Hall, Sheffield, also spending part of his childhood in Penrith, Cumberland. Leaving school at an early age, he became a clerk at Rawson's Brewery, and rose to be manager.

In 1853 he attempted to become a coal merchant in London. He failed and was reduced to destitution. He himself told how for a time he lived in a common lodging for seven shillings and two pence a week.

Through this experience, he learnt to sympathise with the struggles of the poor, and when his good fortune returned, he resolved to devote his time to improving their condition.

His efforts were directed especially against what were known as "coffin ships": unseaworthy and overloaded vessels, often heavily insured, in which unscrupulous owners risked the lives of their crews.

Samuel ( /ˈsæm.juː.əl/;Hebrew: שְׁמוּאֶל, Modern Shmu'el Tiberian Šəmûʼēl; Greek: Σαμουήλ Samouēl; Latin: Samvel; صموئيل, Ṣamu’īl; Strong's: Shemuwel) is a leader of ancient Israel in the Books of Samuel in the Hebrew Bible. He is also known as a prophet and is mentioned in the Qur'an.

His status, as viewed by rabbinical literature, is that he was the last of the Hebrew Judges and the first of the major prophets who began to prophesy inside the Land of Israel. He was thus at the cusp between two eras. According to the text of the Books of Samuel, he also anointed the first two kings of the Kingdom of Israel: Saul and David.

Samuel's mother was Hannah and his father was Elkanah. Hannah, at the beginning of the narrative, is barren and childless, like Abraham's wife Sarah. Hannah prays to God for a child. Eli who is sitting at the foot of the doorpost in the sanctuary at Shiloh, sees her apparently mumbling and thinks Hannah is drunk, but is soon assured of her motivation and sobriety. Eli was, according to the Books of Samuel, the name of a priest of Shiloh, and one of the last Israelite Judges before the rule of kings in ancient Israel. He blesses her after she promises the child to God. Subsequently Hannah becomes pregnant; her child is Samuel. After he is weaned, she leaves him in Eli's care.