The spelling of the word "heikkinen" can be a bit tricky to decipher using English phonetics. In Finland, where the surname originates from, it is pronounced /ˈheikkineŋ/. The double "kk" signals a long consonant sound, indicated by the tilde above the second "k" in the IPA transcription. The final "-en" makes an "ehn" sound, with the stress placed on the first syllable. If you encounter someone with the last name Heikkinen, now you know how to properly pronounce their name!
The etymology of the word "Heikkinen" can be traced back to Finland. It is a Finnish surname, patronymic in nature, derived from the given name "Heikki" which is a Finnish form of the name "Henry". The suffix "-nen" in Finnish surnames signifies a patronymic origin, indicating "son of". Thus, "Heikkinen" can be interpreted as "son of Heikki" or "Heikki's son".