Reversing the sort order of a cte - sql-server

Question

In Microsoft SQL Server, the following works, but produces:
,Son,Dad,Granddad,Great Granddad
whereas I need it to say:
Great Granddad,Granddad,Dad,Son
declare #Family Table(
ID Int Identity(100,1) Primary Key
,Person varchar(128)
,ParentID Int default 0
)
insert into #Family(Person,ParentID) values('Great Granddad',0)
insert into #Family(Person,ParentID) values('Granddad',100)
insert into #Family(Person,ParentID) values('Dad',101)
insert into #Family(Person,ParentID) values('Son',102)
DECLARE #ID Int = 103
;with cte1 as (
select
#ID AS cteID
,ID
,ParentID
,Person as ctePerson
from #Family
where ID = #ID -- this is the starting point you want in your recursion
UNION ALL
select #ID, F.ID, F.ParentID, F.Person
from #Family F
join cte1 P on P.ParentID = F.ID -- this is the recursion
)
-- cte2 can reverse the sort order based on something built in (OVER?)
-- ROW_NUMBER() OVER(ORDER BY ? DESC) AS Row
,cte3 AS(
select ID as cte3ID,(
SELECT ',' + ctePerson
FROM cte1
WHERE cteID = F.ID
FOR XML PATH ('')
) as People
from #Family F
where ID=#ID
)
SELECT * FROM CTE3

Answer 1

I would not order the result of a recursive CTE by using another CTE, as the results of CTEs are semantically tables, and therfore the order is not guaranteed. Instead order when selecting from a CTE, just als like with normal tables.
I would suggest to insert a field representing the level or relationship and order by that:
;with cte1 as (
select
#ID AS cteID
,ID
,ParentID
,Person as ctePerson
,0 lvl -- starting level with 0
from #Family
where ID = #ID -- this is the starting point you want in your recursion
UNION ALL
select #ID, F.ID, F.ParentID, F.Person
, lvl + 1 -- increase level by 1
from #Family F
join cte1 P on P.ParentID = F.ID -- this is the recursion
)
,cte3 AS(
select ID as cte3ID,STUFF(( -- stuff removes the first ','
SELECT ',' + ctePerson
FROM cte1
WHERE cteID = F.ID
ORDER by lvl DESC -- order by level DESC to start with latest ancestor
FOR XML PATH ('')
), 1, 1, '') as People
from #Family F
where ID=#ID
)
SELECT * FROM CTE3