These are the traditional genealogies of rADh.I families descended from vedagarbha of sAvarNa gotra. All gaGgopAdhyAYa are of this gotra. No attempt has been made to make this page more comprehensible: it is mainly intended as people looking for their origins, and I am sure they will treat this only as material to start them off towards more serious investigation.
It would not have been possible for me to collect this information except for the very useful book called brAhmaNa-itihAsa by shrIharilAla caTTopAdhyAYa. I have no idea how he collected all this material, and what criterion he used to select from among the available genealogies of bengali brahmins. The book has sometimes been difficult to decipher, and interested readers should look at the original to verify my interpretation.
And finally, remember, tradition is not history. Similar caveats apply to the historicity of these genealogies as apply to my own.
See my genealogy to see an alternate version (has Rajyadhar's descendants except it has Hemagarbha instead of Rajyadhara, inserts Komalanga and Shobhana after Ratnagarbha, replaces Visho by Vishoka, omits Heramba, calls Mangala as Mangali, inserts Sasthivara after him, and does not have giridhar among the sons of Roshakar; Note that Shobhana exists in the standard list below at the right period but as a cousin, not in the direct line of descent) of the early part of this list, and kumkum's genealogy (not available on the web: the list has Hala's descendants except it has Halayudha for Hala, does not have Shobhana, and inserts Hari, Suvikrama, Vishvambhara, Balai, and Herambakari in his place before shori who is called Gauri instead, and omits Damodara; it also has Gadadhara instead of Gada; Note that Visho and Heramba do occur as cousins in the standar list) and the genealogy of the Savarna Roy Chowdhury family (like the previous except it mentions Vira Raghava and Hala as alias for Halayudha, a Gunai before Hari, Bishai instead of Vishvambhara, Heramba instead of Herambakari, Shauri instead of Gauri; it also has Gadadhara, Haladhara, Ayurama instead of Gada, Hala, Ayu, mentions Jiya as an alias of Shivai, and uses Purari instead of Purai; Note the presence of Gunakar Nayi in the standard list who could have been called Gunai) for yet other versions. It is known from other genealogical traditions as well as the puranic king lists that this kind of error, especially the mistaking of cousins for direct ancestors is actually not very uncommon. A very different list is given in the genealogy of Bhatpara Bhattacharyas which I reproduce here.
Other people mentioned are vishveshvara kunda, hAsya gAGgulI, and keshava dAYI.
There is also the following incomplete one: hala [2] had a descendant (a different source gives Purari[14 above, but 18 there] -> Panchanan Gangopadhyay [15] alias Panchu Shakti Khan settled in Havelishahar alias Halisahar -> shambhupati [16] b. around 1500 -> Jiya Gangopadhyay [17] alias Kamadeva Brahmachari same as the following) kAmadeva [14] -> laksmIkAnta majumadAra rAYacaudhurI [15] who had gaurI, rAma, gopAla, vishveshvara, kRSNa, and mahAdeva. gaurI [16] -> shrImanta -> keshava -> santoSa [19] -> rAmalAla [20]. brother of santoSa [19] -> rAjIvalocana rAYa [20] who was living in 1809. Descendants of santoSa [19] are called the sAvarNa caudhurIs from vaD.ISA. The sAvarNa rAYa caudhurIs who founded calcutta are descended from them and their web site mentions that jiYa gaGgopAdhyAYa (kAmadeva brahacArI) (1535/48-1620) married padmAvatI and had lakSmIkAnta (1570-1649) ->? vidyAdhara rAYa caudhurI.