Korhonen
Korhonen is a surname originating in Finland, where it is the first most common surname. Before 2009, the most common surname in Finland was Virtanen but in 2009 the number of people with the surname Korhonen exceeded the number of people with the surname Virtanen for the first time. It is very likely a derivation of the word 'korho' which is mostly archaic in modern Finnish and as such it has no readily apparent meaning to most Finnish speakers. However, in languages closely related to Finnish such as Karelian, Estonian and Ludic the word 'korho' means "raised" or "upright . As an example of a word derived from this, the Karelian verb 'korhottaa' means to be or move upright", "to have one's head up high", "to raise", "to shake threateningly", "to brandish" and "to listen attentively". There are similar examples from Finnish dialects such as 'korhopää' from Pöytyä meaning roughly "one with a head of upright hair" and 'korholaiho' recorded from Ylistaro meaning "a crop growing upright". 'Korho' is also reported to carry a meaning of "proud", "rich" and/or "boastful" in the southern parts of Finnish Lapland. Also, in modern (both formal and colloquial) Finnish 'korottaa' means "to raise  and 'kohottaa' means to elevate", "to uplift", "to hold up" and "to leaven" and also "to toast" when combined into 'kohottaa malja' meaning "to raise a goblet or a cup". In some dialects, 'korho' is used to mean (a person) of poor hearing or (a person) lacking wit, which are quite apparently most likely derived from the "to listen attentively" meaning of the verb 'korhottaa'. Also, professor Alfred Salmela suggested in 1970 that the word 'korho' is a loan from the Baltic languages and that it has meant "old, village elder or chief". The name originates from Eastern Finland and  is much older than its closest competitor for the title of the most common Finnish surname, Virtanen.