Yes, TobyMac's siblings are Kerri, Kristen, and Mark. Kerri McKeehan is indeed married to Houlie McKeehan. They are part of the same family network, and TobyMac often shares insights about his family life in interviews and on social media.
"Houlie" is a nautical term used to describe a sudden movement or tilt of a boat caused by a strong gust of wind or a large wave. It can be unsettling for those on board but is a common occurrence in rough seas.
There are several theories about the origin of the word hooliganism. The Compact Oxford English Dictionarystates that word may originate from the surname of a fictional rowdy Irish family in a music hall song of the 1890s.[1][2] Clarence Rooks, in his 1899 book, Hooligan Nights, claimed that the word came from Patrick Hoolihan (or Hooligan), an Irish bouncer and thief who lived in the London borough of Southwark.[3] Another writer, Earnest Weekley, wrote in his 1912 book Romance of Words, "The original hooligans were a spirited Irish family of that name whose proceedings enlivened the drab monotony of life in Southwark about fourteen years ago".[3] There have also been references made to a 19th century rural Irish family with the surname Houlihan who were known for their wild lifestyle, then later evolving into O'Holohan (in keeping with the tradition of Irish families for O' to begin the name).[citation needed]Another theory is that the term came from a street gang in Islington named Hooley.[citation needed] Yet another theory is that the term is based on an Irish word, houlie, which means a wild, spirited party.[4]Source: Wikipedia