Naming conventions for column names

Hi All,

Is there any reason to keep column names as usesysid and senate instead of
usersysid and username ?

postgres=# select * from pg_stat_replication ;
pid | usesysid | usename | application_name | client_addr |
client_hostname | client_port | backend_start |
backend_xmin | stat
e | sent_location | write_location | flush_location | replay_location |
sync_priority | sync_state
------+----------+---------+------------------+---------------+-----------------+-------------+-------------------------------+--------------+-------
----+---------------+----------------+----------------+-----------------+---------------+------------
2297 | 24522 | replica | walreceiver | 192.168.16.53 |
| 49782 | 2017-08-15 00:45:43.256404-04 | 149384444 | stream
ing | 111/BD9D5328 | 111/BD9D5328 | 111/BD9D5328 | 111/BD9D52F0 |
0 | async
(1 row)

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Thanks and Regards,
Sachin Kotwal