dhcp3-server or isc-dhcp-server
The package dhcp3-server was renamed some time ago to isc-dhcp-server.
apt-cache search dhcp.-server
isc-dhcp-server - ISC DHCP server for automatic IP address assignment
dhcp3-server - ISC DHCP server (transitional package)
...
Installing either dhcp3-server or isc-dhcp-server will have the same result.
apt-case show dhcp3-server |grep ^Depends
Depends: isc-dhcp-server