The spelling of the surname Dirickson can be explained using IPA phonetic transcription. The word starts with the consonant sound /d/, followed by the vowel sound /ɪ/. The third sound is a consonant blend /rɪk/. The fourth sound is again a consonant blend /ks/. The last two sounds are a vowel sound /ən/, followed by a consonant sound /sən/. Overall, the spelling of Dirickson follows a typical English pattern of combining consonant and vowel sounds to produce a distinctive surname.