Принятие ответа @ GordonLinoff ...
SELECT
name,
rank,
DENSE_RANK() OVER (ORDER BY name DESC, Rank, ((seqnum - 1) / 5)) AS rno
FROM
(
SELECT
*,
ROW_NUMBER() OVER (PARTITION BY name, rank ORDER BY (SELECT null)) AS seqnum
FROM
yourTable
)
sequenced
ORDER BY
3