"Ian", "Iain", or "Eian" or "Eion"(Scottish Gaelic pronunciation: [ˈɪʲən], English: /ˈiː.ən/) is the Scottish Gaelic name corresponding to English John. It is a very common name in much of the English-speaking world. In the United Kingdom, Ian was^[when?] the 19th most common male name, taking account of the whole population (over 300,000 Ians in total).^{[citation needed]}

The name has now fallen out of the top 100 male baby names in the UK, having peaked in popularity as one of the top 10 names throughout the 1960s, while remaining roughly constant in popularity in the USA.

Other Gaelic forms of "John" include "Seonaidh" ("Johnny" from Lowland Scots), "Seon" (from English), "Seathan", and "Seán" and "Eoin" (from Irish). In Greek 'Yanis' or 'Ianis' or 'Ioannis' is a particularly common name. Its Welsh counterpart is Ioan, the French equivalent is Yann, and Slavic is Ivan.

Many Armenian surnames end in -ian (such as Kardashian), as "ian" (or "yan") means "son of" in Armenian.

A birthday is a day or anniversary when a person celebrates his or her date of birth. Birthdays are celebrated in numerous cultures, often with a gift, party or rite of passage. Although the major religions celebrate the birth of their founders (e.g., Buddha's Birthday), Christmas – which is celebrated widely by Christians and non-Christians alike – is the most prominent example. In contrast, certain religious groups, as is the case with Jehovah's Witnesses, express opposition to the very idea of celebrating birthdays.

In most legal systems, one becomes a legal adult on a particular birthday (often between 14 and 21), and reaching age-specific milestones confers particular rights and responsibilities. At certain ages, one may become subject to military conscription or become eligible to enlist in the military, to marry without parental consent, to vote, to run for elected office, to legally purchase (or consume) alcohol and tobacco products, to purchase lottery tickets, or to obtain a driver's license.

Ian Joseph Somerhalder (born December 8, 1978) is an American actor and model, best known for playing Boone Carlyle in the TV drama Lost and Damon Salvatore in the TV drama The Vampire Diaries.

Somerhalder was born and raised in Covington, Louisiana, the son of Edna, a massage therapist, and Robert Somerhalder, an independent building contractor. Raised Catholic, he attended St. Paul's, a private Catholic school in Covington. He embarked on a modeling career from age 10 to 13, and by the age of 17 he decided to go into acting.

In the summer of 2000, Somerhalder starred in the short-lived WB series Young Americans, a spin-off of Dawson's Creek. He played Hamilton Fleming, the son of the dean of a prestigious boarding school. In 2002, Somerhalder played bisexual character Paul Denton in Roger Avary's adaptation of Bret Easton Ellis' novel, The Rules of Attraction, alongside James Van Der Beek, Shannyn Sossamon, and Jessica Biel.

In 2004, Somerhalder scored his breakthrough role when he played Boone Carlyle in the hit TV show Lost. Despite his character's death in the twentieth episode of the first season, Somerhalder returned to the role of Boone for seven more episodes between 2005 and 2010, including the series finale. Somerhalder was the first actor to be cast in a role for the series and the first character to die.