Many-to-many tables that perhaps need conceptual renaming

with two_fk as (select c.relnamespace as target_schema_oid, c.oid as target_table_oid
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype = 'f' 
group by target_schema_oid, target_table_oid
having count(*)=2),
fk as (select 
(select nspname from pg_namespace where oid=f.relnamespace) as foreign_schema,
f.relname as foreign_table,
(select nspname from pg_namespace where oid=c.relnamespace) as target_schema,
c.relname as target_table
from pg_constraint o inner join pg_class f on f.oid = o.confrelid
inner join pg_class c on c.oid = o.conrelid
where o.contype = 'f'  and
(c.relnamespace, c.oid) in (select target_schema_oid, target_table_oid from two_fk)),
fk_with_names as (select fk1.foreign_schema as foreign_schema1, fk1.foreign_table as foreign_table1, 
fk2.foreign_schema as foreign_schema2, fk2.foreign_table as foreign_table2, 
fk1.target_schema, fk1.target_table
from fk as fk1, fk as fk2
where fk1.target_schema=fk2.target_schema and fk1.target_table=fk2.target_table and fk1.foreign_table>fk2.foreign_table)
select foreign_schema1, foreign_table1, foreign_schema2, foreign_table2,  target_schema, target_table as suspected_table_name
from fk_with_names
where target_table ~* ('^' || foreign_table1 || '.*[_]*' || foreign_table2 || '.*$')
or target_table ~* ('^' || foreign_table2 || '.*[_]*' || foreign_table1 || '.*$')
order by target_schema, target_table;