會 and 𡆧 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar
in older Chinese.
Character Evolution
Oracle Bone~1250-1000 BCBronzeLate Western Zhou~800 BCBronzeMid Spring and Autumn~600 BCBronzeLate Spring and Autumn~500 BCBronzeEarly Warring States~400 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealShuowen~100 ADSealShuowen~100 ADClericalSpring and Autumn771-476 BCClericalQin221-206 BCClericalEastern Han25-220 ADClericalEastern Han25-220 ADRegularModern