The invention relates to a method for generating a topic name for accounts grouped under a topic. The method includes obtaining account names associated with the accounts, generating a plurality of n-grams from the account names, and for each n-gram, obtaining a quality score based on relevance and meaningfulness of the n-gram. The relevance is determined using at least one relevance score that reflects how representative the n-gram is for the plurality of n-grams, and the meaningfulness is determined based on whether the n-gram exists in a knowledge base. The method further includes assigning one or more of the n-grams to the topic as the topic name, based on the quality score generated for each of the n-grams.