solved

select CASE WHEN MIN(t.r) = 1 then t.name1

ELSE ''

END as name1,

t.name2, t.name3, sum(t.sum1), sum(t.sum2)

from (select *, ROW_NUMBER() over(partition by name1 order by name1) r

from #tbl1) as t

group by t.name1, t.name2, t.name3