Many Pronouns, Pronominal Adjectives, and Adverbs have corresponding demonstrative, relative, interrogative, and indefinite forms. Such parallel forms are called Correlatives. They are shown in the following table:--

DEMON.	REL.	INTERROG.	INDEF. REL.	INDEF.
is	qui	quis?	quisquis	aliquis
that	who	who?	whoever	some one
tantus	quantus	quantus?	quantuscumque	aliquantus
so great	how (as) great	how great?	however great	some
talis	qualis	qualis?	qualiscumque	----
such	as	of what sort?	of whatever kind
ibi	ubi	ubi?	ubiubi	alicubi
there	where	where?	wherever	somewhere
eo	quo	quo?	quoquo	aliquo
thither	whither	whither?	whithersoever	(to) somewhere
ea	qua	qua?	quaqua	aliqua
that way	which way	which way?	whithersoever	somewhere
inde	unde	unde?	undecumque	alicunde
thence	whence	whence?	whencesoever	from somewhere
tum	cum	quando?	quandocumque	aliquando
then	when	when?	whenever	at some time
tot	quot	quot?	quotquot	alliquot
so many	as	how many?	however many	some, several
totiens	quotiens	quotiens?	quotienscumque	aliquotiens
so often	as	how often?	however often	at several times

Please Conf. Allen and Greenough Latin Grammar 152