If you’d like to set Alias (Another Name) to a Host, set CNAME record in a zone file.

[1] Set CNAME record in a zone file.

[root@soncq ~]# vi /var/named/local.lan
$TTL 86400
@   IN  SOA     soncq.local. root.local. (
        # update serial if update zone file
        2021022402  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
        IN  NS      soncq.local.
        IN  A       10.0.0.30
        IN  MX 10   soncq.local.

soncq     IN  A       10.0.0.30
www     IN  A       10.0.0.31

# [Alias] IN CNAME [Original Name]
ftp     IN  CNAME   local.

[root@soncq ~]# rndc reload
server reload successful
# verify resolution
[root@soncq ~]# dig ftp.local.

; <<>> DiG 9.11.26-RedHat-9.11.26-3.el8 <<>> ftp.local.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 921
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 95bb76ad3b5fba2e9d888d7e6035b959129ae8ee7a065547 (good)
;; QUESTION SECTION:
;ftp.local.                 IN      A

;; ANSWER SECTION:
ftp.local.          86400   IN      CNAME   soncq.local.
soncq.local.          86400   IN      A       10.0.0.30

;; AUTHORITY SECTION:
local.              86400   IN      NS      soncq.local.

;; Query time: 0 msec
;; SERVER: 10.0.0.30#53(10.0.0.30)
;; WHEN: Thu July 14 14:54:33 ICT 2022
;; MSG SIZE  rcvd: 118