Mr Nikolai Johannes Peltomäki was born in Lavia, Finland on 26 December 1886; he was the son of Oskari Juhonpoika Peltomäki (1855-1924) and Josefiina Taavetintytär (1859-1931).
Nikolai is understood to have spent time working or studying in Pori in western Finland from 1902; he later ended up working in Tampere but by 1906 he had moved to Helsinki and was working as a painter and as a shop assistant in a bookstore.
Peltomäki, who was unmarried, boarded the Titanic at Southampton as a third class passenger (ticket number 3101291 which cost £7, 18s, 6d) and was described as a general labourer; he was destined for New York City.; the reason for his travelling is unknown.
Nikolai Peltomäki died in the sinking and his body, if recovered, was never identified.
His father died in 1924 and his mother in 1931.