I have found an article of hornbills which includes where first breedings took place know a certain person that might be interested
GROUND HORNBILLS
northern ground hornbill - bucorvus abyssinicus - Basel zoo 1953
southern ground hornbill - bucorvus leadbeateri - jacksonville zoo 1980
TOCKUS
african crowned hornbill - tockus alboterminatus - houston zoo 1993
african grey hornbill - tockus nasutus - walsrode - 1981
red billed hornbill - tockus erythrorhynchus - frankfurt zoo & berlin zoo 1926 (the first hornbill species to breed in any zoo)
eastern yellow billed hornbill - tockus flavirostris - kitakyushu zoo, japan 1984
southern yellow billed hornbill - tockus leucomelas - bloemfontein zoo, south africa 1961
von der deckens hornbill - tockus deckeni deckeni - winnipeg zoo 1976
jacksons hornbill - tockus deckeni jacksoni - london zoo 1974
ANTHRACOCEROS
malay black hornbill - anthracoceros malayanus - jurong bird park 1992
indian pied hornbill - anthracoceros coronatus - honolulu zoo 1953
asian pied hornbill - anthrcoceros albirostris albirostris - woodland park zoo, seattle 1972
sunda pied hornbill - anthracoceros albirostris convexus - chessington & beauval 1992
BUCEROS
great indian hornbill - buceros bicornis - honolulu zoo 1968
javan rhinoceros hornbill - buceros rhinoceros - audubon park, new orleans 1988
bornean rhinoceros hornbill - buceros rhinoceros ornis breeding centre, majorca 1993
rufous hornbill - buceros hydrocorax - jurong bird park 1996
PENELOPIDES
south sulawesi tarictic hornbill - penelopides exarhatus sanfodi - san diego wild animal park 1993
visayan tarictic hornbill - penelopides panini - bacolod breeding centre, negros 2000
luzon tarictic hornbill - penelopides manillae - san diego zoo 1983
samar tarictic hornbill - penelopides affinis samarensis - san diego zoo 1993
ACEROS
white crowned hornbill - aceros comatus - ornis breeding centre majorca 1993
sulawesi wrinkled hornbill - aceros cassidix - ornis breeding centre, majorca 1991
sunda wrinkled hornbill - aceros corrugatus - audubon park, new orleans 1988
blyths hornbill - aceros plicatus - rotterdam zoo, sandiego zoo & cricket st thomas wp, uk 1994
wreathed hornbill - aceros undulatus - bronx zoo 1977
writhe billed hornbill - aceros leucocephalus - miami metrozoo 1989
CERATOGYMNA
trumpeter hornbill - ceratogymna bucinator - natal zoo, south africa 1970
grey cheeked hornbill - ceratogymna subcylindricus - birdworld, uk 1972
silvery cheeked hornbill - ceratogymna brevis - ornis breeding centre, majorca 1991.
GROUND HORNBILLS
northern ground hornbill - bucorvus abyssinicus - Basel zoo 1953
southern ground hornbill - bucorvus leadbeateri - jacksonville zoo 1980
TOCKUS
african crowned hornbill - tockus alboterminatus - houston zoo 1993
african grey hornbill - tockus nasutus - walsrode - 1981
red billed hornbill - tockus erythrorhynchus - frankfurt zoo & berlin zoo 1926 (the first hornbill species to breed in any zoo)
eastern yellow billed hornbill - tockus flavirostris - kitakyushu zoo, japan 1984
southern yellow billed hornbill - tockus leucomelas - bloemfontein zoo, south africa 1961
von der deckens hornbill - tockus deckeni deckeni - winnipeg zoo 1976
jacksons hornbill - tockus deckeni jacksoni - london zoo 1974
ANTHRACOCEROS
malay black hornbill - anthracoceros malayanus - jurong bird park 1992
indian pied hornbill - anthracoceros coronatus - honolulu zoo 1953
asian pied hornbill - anthrcoceros albirostris albirostris - woodland park zoo, seattle 1972
sunda pied hornbill - anthracoceros albirostris convexus - chessington & beauval 1992
BUCEROS
great indian hornbill - buceros bicornis - honolulu zoo 1968
javan rhinoceros hornbill - buceros rhinoceros - audubon park, new orleans 1988
bornean rhinoceros hornbill - buceros rhinoceros ornis breeding centre, majorca 1993
rufous hornbill - buceros hydrocorax - jurong bird park 1996
PENELOPIDES
south sulawesi tarictic hornbill - penelopides exarhatus sanfodi - san diego wild animal park 1993
visayan tarictic hornbill - penelopides panini - bacolod breeding centre, negros 2000
luzon tarictic hornbill - penelopides manillae - san diego zoo 1983
samar tarictic hornbill - penelopides affinis samarensis - san diego zoo 1993
ACEROS
white crowned hornbill - aceros comatus - ornis breeding centre majorca 1993
sulawesi wrinkled hornbill - aceros cassidix - ornis breeding centre, majorca 1991
sunda wrinkled hornbill - aceros corrugatus - audubon park, new orleans 1988
blyths hornbill - aceros plicatus - rotterdam zoo, sandiego zoo & cricket st thomas wp, uk 1994
wreathed hornbill - aceros undulatus - bronx zoo 1977
writhe billed hornbill - aceros leucocephalus - miami metrozoo 1989
CERATOGYMNA
trumpeter hornbill - ceratogymna bucinator - natal zoo, south africa 1970
grey cheeked hornbill - ceratogymna subcylindricus - birdworld, uk 1972
silvery cheeked hornbill - ceratogymna brevis - ornis breeding centre, majorca 1991.
