What is the meaning of Lapsi?

Apostates who renounced their faith under persecution by the Ancient Roman authorities.

inflection of laps:

1. definite nominative singular
2. indefinite dative/ablative singular

definite nominative singular

indefinite dative/ablative singular

partitive plural of laps

child (person who is below the age of adulthood)

child (daughter or son)

child (member of a religious community)

alternative form of laps

child

inflection of lāpsus:

1. nominative/vocative masculine plural
2. genitive masculine/neuter singular

nominative/vocative masculine plural

genitive masculine/neuter singular

Source: wiktionary.org