The focus of this article is on religious transmission in families and other religious influences among young adults and their linkage to changes in faith in transition to adulthood. The special interest lies in the question of what happens to those with no religious upbringing at home: are there other factors which may turn out as meaningful and contribute to religious growth when parents are not active in giving religious upbringing? The study is based on a 10-year follow-up study of young people between the ages of 14/15 to 25 who were confirmed in the Evangelical Lutheran Church of Finland. Of all young adults, about one-third became more distant from faith, and about one in seven closer to faith in the transition to adulthood. Young people who have experienced a religious upbringing from both parents are far most likely to believe and they experience less distancing from faith. However, beliefs may also develop and remain in circumstances with no religious upbringing at home if there are other meaningful influences in the lives of young people. Confirmation period, and grandparents, in particular, were mentioned as contributing to growth in faith by those with no religious upbringing from home, and school was mentioned as providing general knowledge.